telephone

Eavesdropping with your cell phone

business, security / /

From David S. Bennahum’s “Hope You Like Jamming, Too” (Slate):

…innovative industrial spies, who have several neat new tricks. These days, a boardroom Mata Hari can purchase a specially designed cell phone that will answer incoming calls while appearing to be switched off. In a business meeting, she could casually leave her phone on the table while excusing herself to go to the bathroom. Once she’s gone, she can call the phone she left behind and eavesdrop on what the other side is saying in her absence.

Eavesdropping with your cell phone Read More »

SMS gateways you can use to get around high texting charges

business, cool stuff, tech help / /

Tired of high SMS charges? Use these SMS gateways, which translate emails & IMs into SMS text messages … for free (well, to the sender, anyway – the recipient still has to pay). And when recipients reply, those replies come back to the sender in the same format; in other words, you email someone, they receive a text, they reply, & you get it back as an email.

One more caveat: you obviously have to know which carrier people are using in order to send them a text message, so ask.

Sprint: phone#@messaging.sprintpcs.com

Verizon: phone#@vtext.com

T-Mobile: phone#@tmomail.com

AT&T: phone#@txt.att.net

AIM: +1phone#

The information here came from “The Great Text Rip-Off”, originally printed in the June 2009 issue of Popular Mechanics.

SMS gateways you can use to get around high texting charges Read More »

Cell phone viruses

business, security, tech in changing society / /

From Jim Giles’ “The inside story of the Conficker worm” (New Scientist: 12 June 2009):

Earlier this year, smartphone users in China started to get messages promising a “sexy view” if they clicked on a link. The link led to a download. That download was a spam generator which, once installed, sent identical “sexy view” messages to everyone in the owner’s contacts list.

That was the first virus known to travel by text message. It was chiefly an annoyance, but there is great potential harm from mobile viruses, especially as technologies such as Bluetooth provide new ways for viruses to spread. But there has never yet been a cellphone threat as serious as Conficker is to PCs.

There are two reasons for that, says Albert-László Barabási of Northeastern University in Boston. He and his colleagues used billing data to model the spread of a mobile virus. They found that Bluetooth is an inefficient way of transmitting a virus as it can only jump between users who are within 30 metres of each other. A better option would be for the virus to disguise itself as a picture message. But that could still only infect handsets running the same operating system. As the mobile market is fragmented, says Barabási, no one virus can gain a foothold.

Cell phone viruses Read More »

Taxi driver party lines

business, language & literature, politics, security, tech in changing society / /

8th Ave .....Midtown Manhattan
Creative Commons License photo credit: 708718

From Annie Karni’s “Gabbing Taxi Drivers Talking on ‘Party Lines’” (The New York Sun: 11 January 2007):

It’s not just wives at home or relatives overseas that keep taxi drivers tied up on their cellular phones during work shifts. Many cabbies say that when they are chatting on duty, it’s often with their cab driver colleagues on group party lines. Taxi drivers say they use conference calls to discuss directions and find out about congested routes to avoid. They come to depend on one another as first responders, reacting faster even than police to calls from drivers in distress. Some drivers say they participate in group prayers on a party line.

…

It is during this morning routine, waiting for the first shuttle flights to arrive from Washington and Boston, where many friendships between cabbies are forged and cell phone numbers are exchanged, Mr. Sverdlov said. Once drivers have each other’s numbers, they can use push-to-talk technology to call large groups all at once.

Mr. Sverdlov said he conferences with up to 10 cabbies at a time to discuss “traffic, what’s going on, this and that, and where do cops stay.” He estimated that every month, he logs about 20,000 talking minutes on his cell phone.

While civilian drivers are allowed to use hands-free devices to talk on cell phones while behind the wheel, the Taxi & Limousine Commission imposed a total cell phone ban for taxi drivers on duty in 1999. In 2006, the Taxi & Limousine Commission issued 1,049 summonses for phone use while on duty, up by almost 69% from the 621 summonses it issued the previous year. Drivers caught chatting while driving are fined $200 and receive two-point penalties on their licenses.

…

Drivers originally from countries like Israel, China, and America, who are few and far between, say they rarely chat on the phone with other cab drivers because of the language barrier. For many South Asians and Russian drivers, however, conference calls that are prohibited by the Taxi & Limousine Commission are mainstays of cabby life.

Taxi driver party lines Read More »

Why everyone wants a computer: socializing

business, history, social software, tech in changing society / /

From Paul Graham’s “Why TV Lost” (Paul Graham: March 2009):

The somewhat more surprising force was one specific type of innovation: social applications. The average teenage kid has a pretty much infinite capacity for talking to their friends. But they can’t physically be with them all the time. When I was in high school the solution was the telephone. Now it’s social networks, multiplayer games, and various messaging applications. The way you reach them all is through a computer. Which means every teenage kid (a) wants a computer with an Internet connection, (b) has an incentive to figure out how to use it, and (c) spends countless hours in front of it.

This was the most powerful force of all. This was what made everyone want computers. Nerds got computers because they liked them. Then gamers got them to play games on. But it was connecting to other people that got everyone else: that’s what made even grandmas and 14 year old girls want computers.

Why everyone wants a computer: socializing Read More »

Matthew, the blind phone phreaker

history, law, security, tech in changing society / /

From Kevin Poulsen’s “Teenage Hacker Is Blind, Brash and in the Crosshairs of the FBI” (Wired: 29 February 2008):

At 4 in the morning of May 1, 2005, deputies from the El Paso County Sheriff’s Office converged on the suburban Colorado Springs home of Richard Gasper, a TSA screener at the local Colorado Springs Municipal Airport. They were expecting to find a desperate, suicidal gunman holding Gasper and his daughter hostage.

“I will shoot,” the gravely voice had warned, in a phone call to police minutes earlier. “I’m not afraid. I will shoot, and then I will kill myself, because I don’t care.”

But instead of a gunman, it was Gasper himself who stepped into the glare of police floodlights. Deputies ordered Gasper’s hands up and held him for 90 minutes while searching the house. They found no armed intruder, no hostages bound in duct tape. Just Gasper’s 18-year-old daughter and his baffled parents.

A federal Joint Terrorism Task Force would later conclude that Gasper had been the victim of a new type of nasty hoax, called “swatting,” that was spreading across the United States. Pranksters were phoning police with fake murders and hostage crises, spoofing their caller IDs so the calls appear to be coming from inside the target’s home. The result: police SWAT teams rolling to the scene, sometimes bursting into homes, guns drawn.

Now the FBI thinks it has identified the culprit in the Colorado swatting as a 17-year-old East Boston phone phreak known as “Li’l Hacker.” Because he’s underage, Wired.com is not reporting Li’l Hacker’s last name. His first name is Matthew, and he poses a unique challenge to the federal justice system, because he is blind from birth.

…

Interviews by Wired.com with Matt and his associates, and a review of court documents, FBI reports and audio recordings, paints a picture of a young man with an uncanny talent for quick telephone con jobs. Able to commit vast amounts of information to memory instantly, Matt has mastered the intricacies of telephone switching systems, while developing an innate understanding of human psychology and organization culture — knowledge that he uses to manipulate his patsies and torment his foes.

…

Matt says he ordered phone company switch manuals off the internet and paid to have them translated into Braille. He became a regular caller to internal telephone company lines, where he’d masquerade as an employee to perform tricks like tracing telephone calls, getting free phone features, obtaining confidential customer information and disconnecting his rivals’ phones.

It was, relatively speaking, mild stuff. The teen though, soon fell in with a bad crowd. The party lines were dominated by a gang of half-a-dozen miscreants who informally called themselves the “Wrecking Crew” and “The Cavalry.”
…

By then, Matt’s reputation had taken on a life of its own, and tales of some of his hacks — perhaps apocryphal — are now legends. According to Daniels, he hacked his school’s PBX so that every phone would ring at once. Another time, he took control of a hotel elevator, sending it up and down over and over again. One story has it that Matt phoned a telephone company frame room worker at home in the middle of the night, and persuaded him to get out of bed and return to work to disconnect someone’s phone.

Matthew, the blind phone phreaker Read More »

The NSA and threats to privacy

history, law, politics, security, tech in changing society, technology / /

From James Bamford’s “Big Brother Is Listening” (The Atlantic: April 2006):

This legislation, the 1978 Foreign Intelligence Surveillance Act, established the FISA court—made up of eleven judges handpicked by the chief justice of the United States—as a secret part of the federal judiciary. The court’s job is to decide whether to grant warrants requested by the NSA or the FBI to monitor communications of American citizens and legal residents. The law allows the government up to three days after it starts eavesdropping to ask for a warrant; every violation of FISA carries a penalty of up to five years in prison. Between May 18, 1979, when the court opened for business, until the end of 2004, it granted 18,742 NSA and FBI applications; it turned down only four outright.

Such facts worry Jonathan Turley, a George Washington University law professor who worked for the NSA as an intern while in law school in the 1980s. The FISA “courtroom,” hidden away on the top floor of the Justice Department building (because even its location is supposed to be secret), is actually a heavily protected, windowless, bug-proof installation known as a Sensitive Compartmented Information Facility, or SCIF.

…

It is true that the court has been getting tougher. From 1979 through 2000, it modified only two out of 13,087 warrant requests. But from the start of the Bush administration, in 2001, the number of modifications increased to 179 out of 5,645 requests. Most of those—173—involved what the court terms “substantive modifications.”

…

Contrary to popular perception, the NSA does not engage in “wiretapping”; it collects signals intelligence, or “sigint.” In contrast to the image we have from movies and television of an FBI agent placing a listening device on a target’s phone line, the NSA intercepts entire streams of electronic communications containing millions of telephone calls and e-mails. It runs the intercepts through very powerful computers that screen them for particular names, telephone numbers, Internet addresses, and trigger words or phrases. Any communications containing flagged information are forwarded by the computer for further analysis.

…

Names and information on the watch lists are shared with the FBI, the CIA, the Department of Homeland Security, and foreign intelligence services. Once a person’s name is in the files, even if nothing incriminating ever turns up, it will likely remain there forever. There is no way to request removal, because there is no way to confirm that a name is on the list.

In December of 1997, in a small factory outside the southern French city of Toulouse, a salesman got caught in the NSA’s electronic web. Agents working for the NSA’s British partner, the Government Communications Headquarters, learned of a letter of credit, valued at more than $1.1 million, issued by Iran’s defense ministry to the French company Microturbo. According to NSA documents, both the NSA and the GCHQ concluded that Iran was attempting to secretly buy from Microturbo an engine for the embargoed C-802 anti-ship missile. Faxes zapping back and forth between Toulouse and Tehran were intercepted by the GCHQ, which sent them on not just to the NSA but also to the Canadian and Australian sigint agencies, as well as to Britain’s MI6. The NSA then sent the reports on the salesman making the Iranian deal to a number of CIA stations around the world, including those in Paris and Bonn, and to the U.S. Commerce Department and the Customs Service. Probably several hundred people in at least four countries were reading the company’s communications.

…

Such events are central to the current debate involving the potential harm caused by the NSA’s warrantless domestic eavesdropping operation. Even though the salesman did nothing wrong, his name made its way into the computers and onto the watch lists of intelligence, customs, and other secret and law-enforcement organizations around the world. Maybe nothing will come of it. Maybe the next time he tries to enter the United States or Britain he will be denied, without explanation. Maybe he will be arrested. As the domestic eavesdropping program continues to grow, such uncertainties may plague innocent Americans whose names are being run through the supercomputers even though the NSA has not met the established legal standard for a search warrant. It is only when such citizens are turned down while applying for a job with the federal government—or refused when seeking a Small Business Administration loan, or turned back by British customs agents when flying to London on vacation, or even placed on a “no-fly” list—that they will realize that something is very wrong. But they will never learn why.

…

General Michael Hayden, director of the NSA from 1999 to 2005 and now principal deputy director of national intelligence, noted in 2002 that during the 1990s, e-communications “surpassed traditional communications. That is the same decade when mobile cell phones increased from 16 million to 741 million—an increase of nearly 50 times. That is the same decade when Internet users went from about 4 million to 361 million—an increase of over 90 times. Half as many land lines were laid in the last six years of the 1990s as in the whole previous history of the world. In that same decade of the 1990s, international telephone traffic went from 38 billion minutes to over 100 billion. This year, the world’s population will spend over 180 billion minutes on the phone in international calls alone.”

Intercepting communications carried by satellite is fairly simple for the NSA. The key conduits are the thirty Intelsat satellites that ring the Earth, 22,300 miles above the equator. Many communications from Europe, Africa, and the Middle East to the eastern half of the United States, for example, are first uplinked to an Intelsat satellite and then downlinked to AT&T’s ground station in Etam, West Virginia. From there, phone calls, e-mails, and other communications travel on to various parts of the country. To listen in on that rich stream of information, the NSA built a listening post fifty miles away, near Sugar Grove, West Virginia. Consisting of a group of very large parabolic dishes, hidden in a heavily forested valley and surrounded by tall hills, the post can easily intercept the millions of calls and messages flowing every hour into the Etam station. On the West Coast, high on the edge of a bluff overlooking the Okanogan River, near Brewster, Washington, is the major commercial downlink for communications to and from Asia and the Pacific. Consisting of forty parabolic dishes, it is reportedly the largest satellite antenna farm in the Western Hemisphere. A hundred miles to the south, collecting every whisper, is the NSA’s western listening post, hidden away on a 324,000-acre Army base in Yakima, Washington. The NSA posts collect the international traffic beamed down from the Intelsat satellites over the Atlantic and Pacific. But each also has a number of dishes that appear to be directed at domestic telecommunications satellites.

Until recently, most international telecommunications flowing into and out of the United States traveled by satellite. But faster, more reliable undersea fiber-optic cables have taken the lead, and the NSA has adapted. The agency taps into the cables that don’t reach our shores by using specially designed submarines, such as the USS Jimmy Carter, to attach a complex “bug” to the cable itself. This is difficult, however, and undersea taps are short-lived because the batteries last only a limited time. The fiber-optic transmission cables that enter the United States from Europe and Asia can be tapped more easily at the landing stations where they come ashore. With the acquiescence of the telecommunications companies, it is possible for the NSA to attach monitoring equipment inside the landing station and then run a buried encrypted fiber-optic “backhaul” line to NSA headquarters at Fort Meade, Maryland, where the river of data can be analyzed by supercomputers in near real time.

Tapping into the fiber-optic network that carries the nation’s Internet communications is even easier, as much of the information transits through just a few “switches” (similar to the satellite downlinks). Among the busiest are MAE East (Metropolitan Area Ethernet), in Vienna, Virginia, and MAE West, in San Jose, California, both owned by Verizon. By accessing the switch, the NSA can see who’s e-mailing with whom over the Internet cables and can copy entire messages. Last September, the Federal Communications Commission further opened the door for the agency. The 1994 Communications Assistance for Law Enforcement Act required telephone companies to rewire their networks to provide the government with secret access. The FCC has now extended the act to cover “any type of broadband Internet access service” and the new Internet phone services—and ordered company officials never to discuss any aspect of the program.

…

The National Security Agency was born in absolute secrecy. Unlike the CIA, which was created publicly by a congressional act, the NSA was brought to life by a top-secret memorandum signed by President Truman in 1952, consolidating the country’s various military sigint operations into a single agency. Even its name was secret, and only a few members of Congress were informed of its existence—and they received no information about some of its most important activities. Such secrecy has lent itself to abuse.

During the Vietnam War, for instance, the agency was heavily involved in spying on the domestic opposition to the government. Many of the Americans on the watch lists of that era were there solely for having protested against the war. … Even so much as writing about the NSA could land a person a place on a watch list.

…

For instance, during World War I, the government read and censored thousands of telegrams—the e-mail of the day—sent hourly by telegraph companies. Though the end of the war brought with it a reversion to the Radio Act of 1912, which guaranteed the secrecy of communications, the State and War Departments nevertheless joined together in May of 1919 to create America’s first civilian eavesdropping and code-breaking agency, nicknamed the Black Chamber. By arrangement, messengers visited the telegraph companies each morning and took bundles of hard-copy telegrams to the agency’s offices across town. These copies were returned before the close of business that day.

A similar tale followed the end of World War II. In August of 1945, President Truman ordered an end to censorship. That left the Signal Security Agency (the military successor to the Black Chamber, which was shut down in 1929) without its raw intelligence—the telegrams provided by the telegraph companies. The director of the SSA sought access to cable traffic through a secret arrangement with the heads of the three major telegraph companies. The companies agreed to turn all telegrams over to the SSA, under a plan code-named Operation Shamrock. It ran until the government’s domestic spying programs were publicly revealed, in the mid-1970s.

…

Frank Church, the Idaho Democrat who led the first probe into the National Security Agency, warned in 1975 that the agency’s capabilities

“could be turned around on the American people, and no American would have any privacy left, such [is] the capability to monitor everything: telephone conversations, telegrams, it doesn’t matter. There would be no place to hide. If this government ever became a tyranny, if a dictator ever took charge in this country, the technological capacity that the intelligence community has given the government could enable it to impose total tyranny, and there would be no way to fight back, because the most careful effort to combine together in resistance to the government, no matter how privately it is done, is within the reach of the government to know. Such is the capacity of this technology.”

The NSA and threats to privacy Read More »

How Obama raised money in Silicon Valley & using the Net

business, history, law, politics / /

From Joshua Green’s “The Amazing Money Machine” (The Atlantic: June 2008):

That early fund-raiser [in February 2007] and others like it were important to Obama in several respects. As someone attempting to build a campaign on the fly, he needed money to operate. As someone who dared challenge Hillary Clinton, he needed a considerable amount of it. And as a newcomer to national politics, though he had grassroots appeal, he needed to establish credibility by making inroads to major donors—most of whom, in California as elsewhere, had been locked down by the Clinton campaign.

Silicon Valley was a notable exception. The Internet was still in its infancy when Bill Clinton last ran for president, in 1996, and most of the immense fortunes had not yet come into being; the emerging tech class had not yet taken shape. So, unlike the magnates in California real estate (Walter Shorenstein), apparel (Esprit founder Susie Tompkins Buell), and entertainment (name your Hollywood celeb), who all had long-established loyalty to the Clintons, the tech community was up for grabs in 2007. In a colossal error of judgment, the Clinton campaign never made a serious approach, assuming that Obama would fade and that lack of money and cutting-edge technology couldn’t possibly factor into what was expected to be an easy race. Some of her staff tried to arrange “prospect meetings” in Silicon Valley, but they were overruled. “There was massive frustration about not being able to go out there and recruit people,” a Clinton consultant told me last year. As a result, the wealthiest region of the wealthiest state in the nation was left to Barack Obama.

Furthermore, in Silicon Valley’s unique reckoning, what everyone else considered to be Obama’s major shortcomings—his youth, his inexperience—here counted as prime assets.

[John Roos, Obama’s Northern California finance chair and the CEO of the Palo Alto law firm Wilson Sonsini Goodrich & Rosati]: “… we recognize what great companies have been built on, and that’s ideas, talent, and inspirational leadership.”

…

The true killer app on My.BarackObama.com is the suite of fund-raising tools. You can, of course, click on a button and make a donation, or you can sign up for the subscription model, as thousands already have, and donate a little every month. You can set up your own page, establish your target number, pound your friends into submission with e-mails to pony up, and watch your personal fund-raising “thermometer” rise. “The idea,” [Joe Rospars, a veteran of Dean’s campaign who had gone on to found an Internet fund-raising company and became Obama’s new-media director] says, “is to give them the tools and have them go out and do all this on their own.”

…

“What’s amazing,” says Peter Leyden of the New Politics Institute, “is that Hillary built the best campaign that has ever been done in Democratic politics on the old model—she raised more money than anyone before her, she locked down all the party stalwarts, she assembled an all-star team of consultants, and she really mastered this top-down, command-and-control type of outfit. And yet, she’s getting beaten by this political start-up that is essentially a totally different model of the new politics.”

Before leaving Silicon Valley, I stopped by the local Obama headquarters. It was a Friday morning in early March, and the circus had passed through town more than a month earlier, after Obama lost the California primary by nine points. Yet his headquarters was not only open but jammed with volunteers. Soon after I arrived, everyone gathered around a speakerphone, and Obama himself, between votes on the Senate floor, gave a brief hortatory speech telling volunteers to call wavering Edwards delegates in Iowa before the county conventions that Saturday (they took place two months after the presidential caucuses). Afterward, people headed off to rows of computers, put on telephone headsets, and began punching up phone numbers on the Web site, ringing a desk bell after every successful call. The next day, Obama gained nine delegates, including a Clinton delegate.

The most striking thing about all this was that the headquarters is entirely self-sufficient—not a dime has come from the Obama campaign. Instead, everything from the computers to the telephones to the doughnuts and coffee—even the building’s rent and utilities—is user-generated, arranged and paid for by local volunteers. It is one of several such examples across the country, and no other campaign has put together anything that can match this level of self-sufficiency.

…

But while his rivals continued to depend on big givers, Obama gained more and more small donors, until they finally eclipsed the big ones altogether. In February, the Obama campaign reported that 94 percent of their donations came in increments of $200 or less, versus 26 percent for Clinton and 13 percent for McCain. Obama’s claim of 1,276,000 donors through March is so large that Clinton doesn’t bother to compete; she stopped regularly providing her own number last year.

“If the typical Gore event was 20 people in a living room writing six-figure checks,” Gorenberg told me, “and the Kerry event was 2,000 people in a hotel ballroom writing four-figure checks, this year for Obama we have stadium rallies of 20,000 people who pay absolutely nothing, and then go home and contribute a few dollars online.” Obama himself shrewdly capitalizes on both the turnout and the connectivity of his stadium crowds by routinely asking them to hold up their cell phones and punch in a five-digit number to text their contact information to the campaign—to win their commitment right there on the spot.

How Obama raised money in Silicon Valley & using the Net Read More »

How the Greek cell phone network was compromised

business, politics, security, tech in changing society / /

From Vassilis Prevelakis and Diomidis Spinellis’ “The Athens Affair” (IEEE Spectrum: July 2007):

On 9 March 2005, a 38-year-old Greek electrical engineer named Costas Tsalikidis was found hanged in his Athens loft apartment, an apparent suicide. It would prove to be merely the first public news of a scandal that would roil Greece for months.

The next day, the prime minister of Greece was told that his cellphone was being bugged, as were those of the mayor of Athens and at least 100 other high-ranking dignitaries, including an employee of the U.S. embassy.

The victims were customers of Athens-based Vodafone-Panafon, generally known as Vodafone Greece, the country’s largest cellular service provider; Tsalikidis was in charge of network planning at the company.

…

We now know that the illegally implanted software, which was eventually found in a total of four of Vodafone’s Greek switches, created parallel streams of digitized voice for the tapped phone calls. One stream was the ordinary one, between the two calling parties. The other stream, an exact copy, was directed to other cellphones, allowing the tappers to listen in on the conversations on the cellphones, and probably also to record them. The software also routed location and other information about those phone calls to these shadow handsets via automated text messages.

…

The day after Tsalikidis’s body was discovered, CEO Koronias met with the director of the Greek prime minister’s political office. Yiannis Angelou, and the minister of public order, Giorgos Voulgarakis. Koronias told them that rogue software used the lawful wiretapping mechanisms of Vodafone’s digital switches to tap about 100 phones and handed over a list of bugged numbers. Besides the prime minister and his wife, phones belonging to the ministers of national defense, foreign affairs, and justice, the mayor of Athens, and the Greek European Union commissioner were all compromised. Others belonged to members of civil rights organizations, peace activists, and antiglobalization groups; senior staff at the ministries of National Defense, Public Order, Merchant Marine, and Foreign Affairs; the New Democracy ruling party; the Hellenic Navy general staff; and a Greek-American employee at the United States Embassy in Athens.

…

First, consider how a phone call, yours or a prime minister’s, gets completed. Long before you dial a number on your handset, your cellphone has been communicating with nearby cellular base stations. One of those stations, usually the nearest, has agreed to be the intermediary between your phone and the network as a whole. Your telephone handset converts your words into a stream of digital data that is sent to a transceiver at the base station.

The base station’s activities are governed by a base station controller, a special-purpose computer within the station that allocates radio channels and helps coordinate handovers between the transceivers under its control.

This controller in turn communicates with a mobile switching center that takes phone calls and connects them to call recipients within the same switching center, other switching centers within the company, or special exchanges that act as gateways to foreign networks, routing calls to other telephone networks (mobile or landline). The mobile switching centers are particularly important to the Athens affair because they hosted the rogue phone-tapping software, and it is there that the eavesdropping originated. They were the logical choice, because they are at the heart of the network; the intruders needed to take over only a few of them in order to carry out their attack.

Both the base station controllers and the switching centers are built around a large computer, known as a switch, capable of creating a dedicated communications path between a phone within its network and, in principle, any other phone in the world. Switches are holdovers from the 1970s, an era when powerful computers filled rooms and were built around proprietary hardware and software. Though these computers are smaller nowadays, the system’s basic architecture remains largely unchanged.

Like most phone companies, Vodafone Greece uses the same kind of computer for both its mobile switching centers and its base station controllers—Ericsson’s AXE line of switches. A central processor coordinates the switch’s operations and directs the switch to set up a speech or data path from one phone to another and then routes a call through it. Logs of network activity and billing records are stored on disk by a separate unit, called a management processor.

The key to understanding the hack at the heart of the Athens affair is knowing how the Ericsson AXE allows lawful intercepts—what are popularly called “wiretaps.” Though the details differ from country to country, in Greece, as in most places, the process starts when a law enforcement official goes to a court and obtains a warrant, which is then presented to the phone company whose customer is to be tapped.

Nowadays, all wiretaps are carried out at the central office. In AXE exchanges a remote-control equipment subsystem, or RES, carries out the phone tap by monitoring the speech and data streams of switched calls. It is a software subsystem typically used for setting up wiretaps, which only law officers are supposed to have access to. When the wiretapped phone makes a call, the RES copies the conversation into a second data stream and diverts that copy to a phone line used by law enforcement officials.

Ericsson optionally provides an interception management system (IMS), through which lawful call intercepts are set up and managed. When a court order is presented to the phone company, its operators initiate an intercept by filling out a dialog box in the IMS software. The optional IMS in the operator interface and the RES in the exchange each contain a list of wiretaps: wiretap requests in the case of the IMS, actual taps in the RES. Only IMS-initiated wiretaps should be active in the RES, so a wiretap in the RES without a request for a tap in the IMS is a pretty good indicator that an unauthorized tap has occurred. An audit procedure can be used to find any discrepancies between them.

…

It took guile and some serious programming chops to manipulate the lawful call-intercept functions in Vodafone’s mobile switching centers. The intruders’ task was particularly complicated because they needed to install and operate the wiretapping software on the exchanges without being detected by Vodafone or Ericsson system administrators. From time to time the intruders needed access to the rogue software to update the lists of monitored numbers and shadow phones. These activities had to be kept off all logs, while the software itself had to be invisible to the system administrators conducting routine maintenance activities. The intruders achieved all these objectives.

…

The challenge faced by the intruders was to use the RES’s capabilities to duplicate and divert the bits of a call stream without using the dialog-box interface to the IMS, which would create auditable logs of their activities. The intruders pulled this off by installing a series of patches to 29 separate blocks of code, according to Ericsson officials who testified before the Greek parliamentary committee that investigated the wiretaps. This rogue software modified the central processor’s software to directly initiate a wiretap, using the RES’s capabilities. Best of all, for them, the taps were not visible to the operators, because the IMS and its user interface weren’t used.

The full version of the software would have recorded the phone numbers being tapped in an official registry within the exchange. And, as we noted, an audit could then find a discrepancy between the numbers monitored by the exchange and the warrants active in the IMS. But the rogue software bypassed the IMS. Instead, it cleverly stored the bugged numbers in two data areas that were part of the rogue software’s own memory space, which was within the switch’s memory but isolated and not made known to the rest of the switch.

That by itself put the rogue software a long way toward escaping detection. But the perpetrators hid their own tracks in a number of other ways as well. There were a variety of circumstances by which Vodafone technicians could have discovered the alterations to the AXE’s software blocks. For example, they could have taken a listing of all the blocks, which would show all the active processes running within the AXE—similar to the task manager output in Microsoft Windows or the process status (ps) output in Unix. They then would have seen that some processes were active, though they shouldn’t have been. But the rogue software apparently modified the commands that list the active blocks in a way that omitted certain blocks—the ones that related to intercepts—from any such listing.

In addition, the rogue software might have been discovered during a software upgrade or even when Vodafone technicians installed a minor patch. It is standard practice in the telecommunications industry for technicians to verify the existing block contents before performing an upgrade or patch. We don’t know why the rogue software was not detected in this way, but we suspect that the software also modified the operation of the command used to print the checksums—codes that create a kind of signature against which the integrity of the existing blocks can be validated. One way or another, the blocks appeared unaltered to the operators.

Finally, the software included a back door to allow the perpetrators to control it in the future. This, too, was cleverly constructed to avoid detection. A report by the Hellenic Authority for the Information and Communication Security and Privacy (the Greek abbreviation is ADAE) indicates that the rogue software modified the exchange’s command parser—a routine that accepts commands from a person with system administrator status—so that innocuous commands followed by six spaces would deactivate the exchange’s transaction log and the alarm associated with its deactivation, and allow the execution of commands associated with the lawful interception subsystem. In effect, it was a signal to allow operations associated with the wiretaps but leave no trace of them. It also added a new user name and password to the system, which could be used to obtain access to the exchange.

…Security experts have also discovered other rootkits for general-purpose operating systems, such as Linux, Windows, and Solaris, but to our knowledge this is the first time a rootkit has been observed on a special-purpose system, in this case an Ericsson telephone switch.

…

So the investigators painstakingly reconstructed an approximation of the original PLEX source files that the intruders developed. It turned out to be the equivalent of about 6500 lines of code, a surprisingly substantial piece of software.

How the Greek cell phone network was compromised Read More »

Lots of good info about the FBI’s far-reaching wiretapping of US phone systems

law, politics, security, tech in changing society / /

From Ryan Singel’s “Point, Click … Eavesdrop: How the FBI Wiretap Net Operates” (Wired News: 29 August 2007):

The FBI has quietly built a sophisticated, point-and-click surveillance system that performs instant wiretaps on almost any communications device, according to nearly a thousand pages of restricted documents newly released under the Freedom of Information Act.

The surveillance system, called DCSNet, for Digital Collection System Network, connects FBI wiretapping rooms to switches controlled by traditional land-line operators, internet-telephony providers and cellular companies. It is far more intricately woven into the nation’s telecom infrastructure than observers suspected.

It’s a “comprehensive wiretap system that intercepts wire-line phones, cellular phones, SMS and push-to-talk systems,” says Steven Bellovin, a Columbia University computer science professor and longtime surveillance expert.

DCSNet is a suite of software that collects, sifts and stores phone numbers, phone calls and text messages. The system directly connects FBI wiretapping outposts around the country to a far-reaching private communications network.

…

The $10 million DCS-3000 client, also known as Red Hook, handles pen-registers and trap-and-traces, a type of surveillance that collects signaling information — primarily the numbers dialed from a telephone — but no communications content. (Pen registers record outgoing calls; trap-and-traces record incoming calls.)

DCS-6000, known as Digital Storm, captures and collects the content of phone calls and text messages for full wiretap orders.

A third, classified system, called DCS-5000, is used for wiretaps targeting spies or terrorists.

What DCSNet Can Do

Together, the surveillance systems let FBI agents play back recordings even as they are being captured (like TiVo), create master wiretap files, send digital recordings to translators, track the rough location of targets in real time using cell-tower information, and even stream intercepts outward to mobile surveillance vans.

FBI wiretapping rooms in field offices and undercover locations around the country are connected through a private, encrypted backbone that is separated from the internet. Sprint runs it on the government’s behalf.

The network allows an FBI agent in New York, for example, to remotely set up a wiretap on a cell phone based in Sacramento, California, and immediately learn the phone’s location, then begin receiving conversations, text messages and voicemail pass codes in New York. With a few keystrokes, the agent can route the recordings to language specialists for translation.

The numbers dialed are automatically sent to FBI analysts trained to interpret phone-call patterns, and are transferred nightly, by external storage devices, to the bureau’s Telephone Application Database, where they’re subjected to a type of data mining called link analysis.

…

The numerical scope of DCSNet surveillance is still guarded. But we do know that as telecoms have become more wiretap-friendly, the number of criminal wiretaps alone has climbed from 1,150 in 1996 to 1,839 in 2006. That’s a 60 percent jump. And in 2005, 92 percent of those criminal wiretaps targeted cell phones, according to a report published last year.

These figures include both state and federal wiretaps, and do not include antiterrorism wiretaps, which dramatically expanded after 9/11. They also don’t count the DCS-3000’s collection of incoming and outgoing phone numbers dialed. Far more common than full-blown wiretaps, this level of surveillance requires only that investigators certify that the phone numbers are relevant to an investigation.

…

In the 1990s, the Justice Department began complaining to Congress that digital technology, cellular phones and features like call forwarding would make it difficult for investigators to continue to conduct wiretaps. Congress responded by passing the Communications Assistance for Law Enforcement Act, or CALEA, in 1994, mandating backdoors in U.S. telephone switches.

CALEA requires telecommunications companies to install only telephone-switching equipment that meets detailed wiretapping standards. Prior to CALEA, the FBI would get a court order for a wiretap and present it to a phone company, which would then create a physical tap of the phone system.

With new CALEA-compliant digital switches, the FBI now logs directly into the telecom’s network. Once a court order has been sent to a carrier and the carrier turns on the wiretap, the communications data on a surveillance target streams into the FBI’s computers in real time.

…

The released documents suggest that the FBI’s wiretapping engineers are struggling with peer-to-peer telephony provider Skype, which offers no central location to wiretap, and with innovations like caller-ID spoofing and phone-number portability.

…

Despite its ease of use, the new technology is proving more expensive than a traditional wiretap. Telecoms charge the government an average of $2,200 for a 30-day CALEA wiretap, while a traditional intercept costs only $250, according to the Justice Department inspector general. A federal wiretap order in 2006 cost taxpayers $67,000 on average, according to the most recent U.S. Court wiretap report.

What’s more, under CALEA, the government had to pay to make pre-1995 phone switches wiretap-friendly. The FBI has spent almost $500 million on that effort, but many traditional wire-line switches still aren’t compliant.

Processing all the phone calls sucked in by DCSNet is also costly. At the backend of the data collection, the conversations and phone numbers are transferred to the FBI’s Electronic Surveillance Data Management System, an Oracle SQL database that’s seen a 62 percent growth in wiretap volume over the last three years — and more than 3,000 percent growth in digital files like e-mail. Through 2007, the FBI has spent $39 million on the system, which indexes and analyzes data for agents, translators and intelligence analysts.

Lots of good info about the FBI’s far-reaching wiretapping of US phone systems Read More »

Virtual kidnappings a problem in Mexico

business, law, security, tech in changing society, technology / /

From Marc Lacey’s “Exploiting Real Fears With ‘Virtual Kidnappings’ ” (The New York Times: 29 April 2008):

MEXICO CITY — The phone call begins with the cries of an anguished child calling for a parent: “Mama! Papa!” The youngster’s sobs are quickly replaced by a husky male voice that means business.

“We’ve got your child,” he says in rapid-fire Spanish, usually adding an expletive for effect and then rattling off a list of demands that might include cash or jewels dropped off at a certain street corner or a sizable deposit made to a local bank.

The twist is that little Pablo or Teresa is safe and sound at school, not duct-taped to a chair in a rundown flophouse somewhere or stuffed in the back of a pirate taxi. But when the cellphone call comes in, that is not at all clear.

This is “virtual kidnapping,” the name being given to Mexico’s latest crime craze, one that has capitalized on the raw nerves of a country that has been terrorized by the real thing for years.

…

A new hot line set up to deal with the problem of kidnappings in which no one is actually kidnapped received more than 30,000 complaints from last December to the end of February, Joel Ortega, Mexico City’s police chief, announced recently. There have been eight arrests, and 3,415 telephone numbers have been identified as those used by extortionists, he said.

But identifying the phone numbers — they are now listed on a government Web site — has done little to slow the extortion calls. Nearly all the calls are from cellphones, most of them stolen, authorities say.

On top of that, many extortionists are believed to be pulling off the scams from prisons.

Authorities say hundreds of different criminal gangs are engaged in various telephone scams. Besides the false kidnappings, callers falsely tell people they have won cars or money. Sometimes, people are told to turn off their cellphones for an hour so the service can be repaired; then, relatives are called and told that the cellphone’s owner has been kidnapped. Ransom demands have even been made by text message.

…

No money changed hands in her case, but in many instances — as many as a third of the calls, one study showed — the criminals make off with some valuables. One estimate put the take from telephone scams in Mexico in the last six months at 186.6 million pesos, nearly $20 million.

Virtual kidnappings a problem in Mexico Read More »

The shift from interior to exterior lives

art, on writing, technology / /

From Mark Dery’s response to R.U. Sirius’ “Is The Net Good For Writers?” (10 Zen Monkeys: 5 October 2007):

But we live in times of chaos and complexity, and the future of writing and reading is deeply uncertain. Reading and writing are solitary activities. The web enables us to write in public and, maybe one day, strike off the shackles of cubicle hell and get rich living by our wits. Sometimes I think we’re just about to turn that cultural corner. Then I step onto the New York subway, where most of the car is talking nonstop on cellphones. Time was when people would have occupied their idle hours between the covers of a book. No more. We’ve turned the psyche inside out, exteriorizing our egos, extruding our selves into public space and filling our inner vacuums with white noise.

The shift from interior to exterior lives Read More »

How to wiretap

law, tech in changing society, technology / /

From Seth David Schoen’s “Wiretapping vulnerabilities” (Vitanuova: 9 March 2006):

Traditional wiretap threat model: the risks are detection of the tap, and obfuscation of content of communication. …

POTS is basically the same as it was 100 years ago — with central offices and circuit-switching. A phone from 100 years ago will pretty much still work today. “Telephones are a remarkable example of engineering optimization” because they were built to work with very minimal requirements: just two wires between CO and the end subscriber, don’t assume that the subscriber has power, don’t assume that the subscriber has anything else. There is a DC current loop that provides 48 V DC power. The current loop determines the hook switch state. There’s also audio signalling for in-band signalling from phone to CO — or from CO to phone — or for voice. It all depends on context and yet all these things are multiplexed over two wires, including the hook state and the audio signalling and the voice traffic.

If you wanted to tap this: you could do it in three different ways.

* Via the local loop (wired or wireless/cellular).
* Via the CO switch (software programming).
* Via trunk interception (e.g. fiber, microwave, satellite) with demultiplexing.

How do LEAs do it? Almost always at local loop or CO. (By contrast, intelligence agencies are more likely to try to tap trunks.)

How to wiretap Read More »

4 ways to eavesdrop on telephone calls

law, politics, security, tech in changing society, technology / /

From Bruce Schneier’s “VOIP Encryption” (Crypto-Gram Newsletter: 15 April 2006):

There are basically four ways to eavesdrop on a telephone call.

One, you can listen in on another phone extension. This is the method preferred by siblings everywhere. If you have the right access, it’s the easiest. While it doesn’t work for cell phones, cordless phones are vulnerable to a variant of this attack: A radio receiver set to the right frequency can act as another extension.

Two, you can attach some eavesdropping equipment to the wire with a pair of alligator clips. It takes some expertise, but you can do it anywhere along the phone line’s path — even outside the home. This used to be the way the police eavesdropped on your phone line. These days it’s probably most often used by criminals. This method doesn’t work for cell phones, either.

Three, you can eavesdrop at the telephone switch. Modern phone equipment includes the ability for someone to listen in this way. Currently, this is the preferred police method. It works for both land lines and cell phones. You need the right access, but if you can get it, this is probably the most comfortable way to eavesdrop on a particular person.

Four, you can tap the main trunk lines, eavesdrop on the microwave or satellite phone links, etc. It’s hard to eavesdrop on one particular person this way, but it’s easy to listen in on a large chunk of telephone calls. This is the sort of big-budget surveillance that organizations like the National Security Agency do best. They’ve even been known to use submarines to tap undersea phone cables.

4 ways to eavesdrop on telephone calls Read More »

The origins of 2600

history, law, tech in changing society, technology, writing ideas / /

From Nicholas Thompson’s “Who Needs Keys?” (Legal Affairs: November/December 2004):

The event was organized by 2600, a quarterly magazine whose name refers to one of the great discoveries in hacker history: that the plastic whistles given away free in boxes of Cap’n Crunch cereal in the early 1970s could be slightly modified to create sound waves of 2600 MHz, a frequency that allowed you to make free calls on the old AT&T phone system.

The origins of 2600 Read More »

Tracking via cell phone is easy

business, law, security, tech in changing society, technology / /

From Brendan I. Koerner’s “Your Cellphone is a Homing Device” (Legal Affairs: July/August 2003):

What your salesman probably failed to tell you – and may not even realize – is that an E911-capable phone can give your wireless carrier continual updates on your location. The phone is embedded with a Global Positioning System chip, which can calculate your coordinates to within a few yards by receiving signals from satellites. GPS technology gave U.S. military commanders a vital edge during Gulf War II, and sailors and pilots depend on it as well. In the E911-capable phone, the GPS chip does not wait until it senses danger, springing to life when catastrophe strikes; it’s switched on whenever your handset is powered up and is always ready to transmit your location data back to a wireless carrier’s computers. Verizon or T-Mobile can figure out which manicurist you visit just as easily as they can pinpoint a stranded motorist on Highway 59.

So what’s preventing them from doing so, at the behest of either direct marketers or, perhaps more chillingly, the police? Not the law, which is essentially mum on the subject of location-data privacy. As often happens with emergent technology, the law has struggled to keep pace with the gizmo. No federal statute is keeping your wireless provider from informing Dunkin’ Donuts that your visits to Starbucks have been dropping off and you may be ripe for a special coupon offer. Nor are cops explicitly required to obtain a judicial warrant before compiling a record of where you sneaked off to last Thursday night. Despite such obvious potential for abuse, the Federal Communications Commission and the Federal Trade Commission, the American consumer’s ostensible protectors, show little enthusiasm for stepping into the breach. As things stand now, the only real barrier to the dissemination of your daily movements is the benevolence of the telecommunications industry. A show of hands from those who find this a comforting thought? Anyone? …

THE WIRELESS INDUSTRY HAS A NAME FOR SUCH CUSTOM-TAILORED HAWKING: “location-based services,” or LBS. The idea is that GPS chips can be used to locate friends, find the nearest pizzeria, or ensure that Junior is really at the library rather than a keg party. One estimate expects LBS to be a $15 billion market by 2007, a much-needed boost for the flagging telecom sector.

That may be fine for some consumers, but what about those who’d rather opt out of the tracking? The industry’s promise is that LBS customers will have to give explicit permission for their data to be shared with third parties. This is certainly in the spirit of the Wireless Communications and Public Safety Act of 1999, which anticipated that all cellphone carriers will feature E911 technology by 2006. The law stipulated that E911 data – that is, an individual’s second-by-second GPS coordinates – could only be used for nonemergency purposes if “express prior authorization” was provided by the consumer. …

Tracking via cell phone is easy Read More »

Bring down the cell network with SMS spam

security, tech in changing society, technology / /

From John Schwartz’s “Text Hackers Could Jam Cellphones, a Paper Says“:

Malicious hackers could take down cellular networks in large cities by inundating their popular text-messaging services with the equivalent of spam, said computer security researchers, who will announce the findings of their research today.

Such an attack is possible, the researchers say, because cellphone companies provide the text-messaging service to their networks in a way that could allow an attacker who jams the message system to disable the voice network as well.

And because the message services are accessible through the Internet, cellular networks are open to the denial-of-service attacks that occur regularly online, in which computers send so many messages or commands to a target that the rogue data blocks other machines from connecting.

By pushing 165 messages a second into the network, said Patrick D. McDaniel, a professor of computer science and engineering at Pennsylvania State University and the lead researcher on the paper, “you can congest all of Manhattan.”

Also see http://www.smsanalysis.org/.

Bring down the cell network with SMS spam Read More »

Early attempts to control phone usage

business, history, social software, tech in changing society, technology / /

From R. W. Kostal’s Law and English Railway Capitalism, 1825-1875 (quoted in Andrew Odlyzko’s “Pricing and Architecture of the Internet: Historical Perspectives from Telecommunications and Transportation“):

In Britain in 1889, postal officials reprimanded a Leicester subscriber for using his phone to notify the fire brigade of a nearby conflagration. The fire was not on his premises, and his contract directed him to confine his telephone “to his own business and private affairs.” The Leicester Town Council, Chamber of Commerce, and Trade Protection Society all appealed to the postmaster-general, who ruled that the use of the telephone to convey intelligence of fires and riots would be permitted thenceforth.

Early attempts to control phone usage Read More »

Flat local calling rates in US helped grow the Net

business, history, tech in changing society, technology / /

From Andrew Odlyzko’s “Pricing and Architecture of the Internet: Historical Perspectives from Telecommunications and Transportation“:

Moreover, flat rates for local calling played a key role in the rise of the Internet, by promoting much faster spread of this technology in the U.S. than in other countries. (This, as well as the FCC decisions about keeping Internet calls free from access charges, should surely be added to the list of “the 10 key choices that were critical to the Net’s success,” that were compiled by Scott Bradner [28].)

Flat local calling rates in US helped grow the Net Read More »

Douglas Adams on information overload

commonplace book, social software, tech in changing society, technology / /

From Douglas Adam’s “Is there an Artificial God?“:

Let me back up for a minute and talk about the way we communicate. Traditionally, we have a bunch of different ways in which we communicate with each other. One way is one-to-one; we talk to each other, have a conversation. Another is one-to-many, which I’m doing at the moment, or someone could stand up and sing a song, or announce we’ve got to go to war. Then we have many-to-one communication; we have a pretty patchy, clunky, not-really-working version we call democracy, but in a more primitive state I would stand up and say, ‘OK, we’re going to go to war’ and some may shout back ‘No we’re not!’ – and then we have many-to-many communication in the argument that breaks out afterwards!

In this century (and the previous century) we modelled one-to-one communications in the telephone, which I assume we are all familiar with. We have one-to-many communication—boy do we have an awful lot of that; broadcasting, publishing, journalism, etc.—we get information poured at us from all over the place and it’s completely indiscriminate as to where it might land. It’s curious, but we don’t have to go very far back in our history until we find that all the information that reached us was relevant to us and therefore anything that happened, any news, whether it was about something that’s actually happened to us, in the next house, or in the next village, within the boundary or within our horizon, it happened in our world and if we reacted to it the world reacted back. It was all relevant to us, so for example, if somebody had a terrible accident we could crowd round and really help. Nowadays, because of the plethora of one-to-many communication we have, if a plane crashes in India we may get terribly anxious about it but our anxiety doesn’t have any impact. We’re not very well able to distinguish between a terrible emergency that’s happened to somebody a world away and something that’s happened to someone round the corner. We can’t really distinguish between them any more, which is why we get terribly upset by something that has happened to somebody in a soap opera that comes out of Hollywood and maybe less concerned when it’s happened to our sister. We’ve all become twisted and disconnected and it’s not surprising that we feel very stressed and alienated in the world because the world impacts on us but we don’t impact the world. Then there’s many-to-one; we have that, but not very well yet and there’s not much of it about. Essentially, our democratic systems are a model of that and though they’re not very good, they will improve dramatically.

But the fourth, the many-to-many, we didn’t have at all before the coming of the Internet, which, of course, runs on fibre-optics. It’s communication between us …

Douglas Adams on information overload Read More »