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NSA Creating Massive Phone-Call Database

There’s other NSA news today: USA Today is reporting that the NSA is collecting a massive traffic-analysis database on Americans’ phone calls. This looks like yet another piece of Echelon technology turned against Americans.

The NSA’s domestic program, as described by sources, is far more expansive than what the White House has acknowledged. Last year, Bush said he had authorized the NSA to eavesdrop—without warrants—on international calls and international e-mails of people suspected of having links to terrorists when one party to the communication is in the USA. Warrants have also not been used in the NSA’s efforts to create a national call database.

[…]

The government is collecting “external” data on domestic phone calls but is not intercepting “internals,” a term for the actual content of the communication, according to a U.S. intelligence official familiar with the program. This kind of data collection from phone companies is not uncommon; it’s been done before, though never on this large a scale, the official said. The data are used for “social network analysis,” the official said, meaning to study how terrorist networks contact each other and how they are tied together.

Note that this database does not just contain phone calls that either originate or terminate outside the U.S. This database is mostly domestic calls: calls we all make everyday.

AT&T, Verizon, and BellSouth are all providing this information to the NSA. Only Quest has refused.

According to sources familiar with the events, Qwest’s CEO at the time, Joe Nacchio, was deeply troubled by the NSA’s assertion that Qwest didn’t need a court order—or approval under FISA—to proceed. Adding to the tension, Qwest was unclear about who, exactly, would have access to its customers’ information and how that information might be used.

Financial implications were also a concern, the sources said. Carriers that illegally divulge calling information can be subjected to heavy fines. The NSA was asking Qwest to turn over millions of records. The fines, in the aggregate, could have been substantial.

The NSA told Qwest that other government agencies, including the FBI, CIA and DEA, also might have access to the database, the sources said. As a matter of practice, the NSA regularly shares its information—known as “product” in intelligence circles—with other intelligence groups. Even so, Qwest’s lawyers were troubled by the expansiveness of the NSA request, the sources said.

The NSA, which needed Qwest’s participation to completely cover the country, pushed back hard.

Trying to put pressure on Qwest, NSA representatives pointedly told Qwest that it was the lone holdout among the big telecommunications companies. It also tried appealing to Qwest’s patriotic side: In one meeting, an NSA representative suggested that Qwest’s refusal to contribute to the database could compromise national security, one person recalled.

In addition, the agency suggested that Qwest’s foot-dragging might affect its ability to get future classified work with the government. Like other big telecommunications companies, Qwest already had classified contracts and hoped to get more.

Unable to get comfortable with what NSA was proposing, Qwest’s lawyers asked NSA to take its proposal to the FISA court. According to the sources, the agency refused.

We should also assume that the cellphone companies received the same pressure, and probably caved.

This is important to every American, not just those with something to hide. Matthew Yglesias explains why:

It’s important to link this up to the broader chain. One thing the Bush administration says it can do with this meta-data is to start tapping your calls and listening in, without getting a warrant from anyone. Having listened in on your calls, the administration asserts that if it doesn’t like what it hears, it has the authority to detain you indefinitely without trial or charges, torture you until you confess or implicate others, extradite you to a Third World country to be tortured, ship you to a secret prison facility in Eastern Europe, or all of the above. If, having kidnapped and tortured you, the administration determines you were innocent after all, you’ll be dumped without papers somewhere in Albania left to fend for yourself.

Judicial oversight is a security system, and unchecked military and police power is a security threat .

Another analysis here.

EDITED TO ADD (5/11): Orin Kerr on the legality of the program. Updated here.

Posted on May 11, 2006 at 10:40 AM • View Comments

Priority Cell Phones for First Responders

Verizon has announced that is has activated the Access Overload Control (ACCOLC) system, allowing some cell phones to have priority access to the network, even when the network is overloaded.

If you are a first responder with a Verizon phone, please visit the government’s WPS Requestor to provide the necessary information to have your handset activated.

Sounds like you’re going to have to enter some sort of code into your handset. I wonder how long before someone hacks that system.

Posted on May 1, 2006 at 1:29 PM • View Comments

NSA Warrantless Wiretapping and Total Information Awareness

Technology Review has an interesting article discussing some of the technologies used by the NSA in its warrantless wiretapping program, some of them from the killed Total Information Awareness (TIA) program.

Washington’s lawmakers ostensibly killed the TIA project in Section 8131 of the Department of Defense Appropriations Act for fiscal 2004. But legislators wrote a classified annex to that document which preserved funding for TIA’s component technologies, if they were transferred to other government agencies, say sources who have seen the document, according to reports first published in The National Journal. Congress did stipulate that those technologies should only be used for military or foreign intelligence purposes against non-U.S. citizens. Still, while those component projects’ names were changed, their funding remained intact, sometimes under the same contracts.

Thus, two principal components of the overall TIA project have migrated to the Advanced Research and Development Activity (ARDA), which is housed somewhere among the 60-odd buildings of “Crypto City,” as NSA headquarters in Fort Meade, MD, is nicknamed. One of the TIA components that ARDA acquired, the Information Awareness Prototype System, was the core architecture that would have integrated all the information extraction, analysis, and dissemination tools developed under TIA. According to The National Journal, it was renamed “Basketball.” The other, Genoa II, used information technologies to help analysts and decision makers anticipate and pre-empt terrorist attacks. It was renamed “Topsail.”

Posted on April 28, 2006 at 8:01 AM • View Comments

AT&T Assisting NSA Surveillance

Interesting details emerging from EFF’s lawsuit:

According to a statement released by Klein’s attorney, an NSA agent showed up at the San Francisco switching center in 2002 to interview a management-level technician for a special job. In January 2003, Klein observed a new room being built adjacent to the room housing AT&T’s #4ESS switching equipment, which is responsible for routing long distance and international calls.

“I learned that the person whom the NSA interviewed for the secret job was the person working to install equipment in this room,” Klein wrote. “The regular technician work force was not allowed in the room.”

Klein’s job eventually included connecting internet circuits to a splitting cabinet that led to the secret room. During the course of that work, he learned from a co-worker that similar cabinets were being installed in other cities, including Seattle, San Jose, Los Angeles and San Diego.

“While doing my job, I learned that fiber optic cables from the secret room were tapping into the Worldnet (AT&T’s internet service) circuits by splitting off a portion of the light signal,” Klein wrote.

The split circuits included traffic from peering links connecting to other internet backbone providers, meaning that AT&T was also diverting traffic routed from its network to or from other domestic and international providers, according to Klein’s statement.

The secret room also included data-mining equipment called a Narus STA 6400, “known to be used particularly by government intelligence agencies because of its ability to sift through large amounts of data looking for preprogrammed targets,” according to Klein’s statement.

Narus, whose website touts AT&T as a client, sells software to help internet service providers and telecoms monitor and manage their networks, look for intrusions, and wiretap phone calls as mandated by federal law.

More about what the Narus box can do.

EDITED TO ADD (4/14): More about Narus.

Posted on April 14, 2006 at 7:58 AM • View Comments

VOIP Encryption

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.

That’s basically the entire threat model for traditional phone calls. And when most people think about IP telephony—voice over internet protocol, or VOIP—that’s the threat model they probably have in their heads.

Unfortunately, phone calls from your computer are fundamentally different from phone calls from your telephone. Internet telephony’s threat model is much closer to the threat model for IP-networked computers than the threat model for telephony.

And we already know the threat model for IP. Data packets can be eavesdropped on anywhere along the transmission path. Data packets can be intercepted in the corporate network, by the internet service provider and along the backbone. They can be eavesdropped on by the people or organizations that own those computers, and they can be eavesdropped on by anyone who has successfully hacked into those computers. They can be vacuumed up by nosy hackers, criminals, competitors and governments.

It’s comparable to threat No. 3 above, but with the scope vastly expanded.

My greatest worry is the criminal attacks. We already have seen how clever criminals have become over the past several years at stealing account information and personal data. I can imagine them eavesdropping on attorneys, looking for information with which to blackmail people. I can imagine them eavesdropping on bankers, looking for inside information with which to make stock purchases. I can imagine them stealing account information, hijacking telephone calls, committing identity theft. On the business side, I can see them engaging in industrial espionage and stealing trade secrets. In short, I can imagine them doing all the things they could never have done with the traditional telephone network.

This is why encryption for VOIP is so important. VOIP calls are vulnerable to a variety of threats that traditional telephone calls are not. Encryption is one of the essential security technologies for computer data, and it will go a long way toward securing VOIP.

The last time this sort of thing came up, the U.S. government tried to sell us something called “key escrow.” Basically, the government likes the idea of everyone using encryption, as long as it has a copy of the key. This is an amazingly insecure idea for a number of reasons, mostly boiling down to the fact that when you provide a means of access into a security system, you greatly weaken its security.

A recent case in Greece demonstrated that perfectly: Criminals used a cell-phone eavesdropping mechanism already in place, designed for the police to listen in on phone calls. Had the call system been designed to be secure in the first place, there never would have been a backdoor for the criminals to exploit.

Fortunately, there are many VOIP-encryption products available. Skype has built-in encryption. Phil Zimmermann is releasing Zfone, an easy-to-use open-source product. There’s even a VOIP Security Alliance.

Encryption for IP telephony is important, but it’s not a panacea. Basically, it takes care of threats No. 2 through No. 4, but not threat No. 1. Unfortunately, that’s the biggest threat: eavesdropping at the end points. No amount of IP telephony encryption can prevent a Trojan or worm on your computer—or just a hacker who managed to get access to your machine—from eavesdropping on your phone calls, just as no amount of SSL or e-mail encryption can prevent a Trojan on your computer from eavesdropping—or even modifying—your data.

So, as always, it boils down to this: We need secure computers and secure operating systems even more than we need secure transmission.

This essay originally appeared on Wired.com.

Posted on April 6, 2006 at 5:09 AM • View Comments

AT&T's 1.9-Trillion-Call Database

This whole article is worth reading, but I found this tidbit particularly interesting:

He was alluding to databases maintained at an AT&T data center in Kansas, which now contain electronic records of 1.92 trillion telephone calls, going back decades. The Electronic Frontier Foundation, a digital-rights advocacy group, has asserted in a lawsuit that the AT&T Daytona system, a giant storehouse of calling records and Internet message routing information, was the foundation of the N.S.A.’s effort to mine telephone records without a warrant.

An AT&T spokeswoman said the company would not comment on the claim, or generally on matters of national security or customer privacy.

But the mining of the databases in other law enforcement investigations is well established, with documented results. One application of the database technology, called Security Call Analysis and Monitoring Platform, or Scamp, offers access to about nine weeks of calling information. It currently handles about 70,000 queries a month from fraud and law enforcement investigators, according to AT&T documents.

A former AT&T official who had detailed knowledge of the call-record database said the Daytona system takes great care to make certain that anyone using the database – whether AT&T employee or law enforcement official with a subpoena – sees only information he or she is authorized to see, and that an audit trail keeps track of all users. Such information is frequently used to build models of suspects’ social networks.

The official, speaking on condition of anonymity because he was discussing sensitive corporate matters, said every telephone call generated a record: number called, time of call, duration of call, billing category and other details. While the database does not contain such billing data as names, addresses and credit card numbers, those records are in a linked database that can be tapped by authorized users.

New calls are entered into the database immediately after they end, the official said, adding, “I would characterize it as near real time.”

According to a current AT&T employee, whose identity is being withheld to avoid jeopardizing his job, the mining of the AT&T databases had a notable success in helping investigators find the perpetrators of what was known as the Moldovan porn scam.

In 1997 a shadowy group in Moldova, a former Soviet republic, was tricking Internet users by enticing them to a pornography Web site that would download a piece of software that disconnected the computer user from his local telephone line and redialed a costly 900 number in Moldova.

While another long-distance carrier simply cut off the entire nation of Moldova from its network, AT&T and the Moldovan authorities were able to mine the database to track the culprits.

Posted on March 3, 2006 at 11:45 AM • View Comments

Caller ID Spoofing

What’s worse than a bad authentication system? A bad authentication system that people have learned to trust. According to the Associated Press:

In the last few years, Caller ID spoofing has become much easier. Millions of people have Internet telephone equipment that can be set to make any number appear on a Caller ID system. And several Web sites have sprung up to provide Caller ID spoofing services, eliminating the need for any special hardware.

For instance, Spoofcard.com sells a virtual “calling card” for $10 that provides 60 minutes of talk time. The user dials a toll-free number, then keys in the destination number and the Caller ID number to display.

Near as anyone can tell, this is perfectly legal. (Although the FCC is investigating.)

The applications for Caller ID spoofing are not limited to fooling people. There’s real fraud that can be committed:

Lance James, chief scientist at security company Secure Science Corp., said Caller ID spoofing Web sites are used by people who buy stolen credit card numbers. They will call a service such as Western Union, setting Caller ID to appear to originate from the card holder’s home, and use the credit card number to order cash transfers that they then pick up.

Exposing a similar vulnerability, Caller ID is used by credit-card companies to authenticate newly issued cards. The recipients are generally asked to call from their home phones to activate their cards.

And, of course, harmful pranks:

In one case, SWAT teams surrounded a building in New Brunswick, N.J., last year after police received a call from a woman who said she was being held hostage in an apartment. Caller ID was spoofed to appear to come from the apartment.

It’s also easy to break into a cell phone voice mailbox using spoofing, because many systems are set to automatically grant entry to calls from the owner of the account. Stopping that requires setting a PIN code or password for the mailbox.

I have never been a fan of Caller ID. My phone number is configured to block Caller ID on outgoing calls. The number of phone numbers that refuse to accept my calls is growing, however.

Posted on March 3, 2006 at 7:10 AM •

More on Greek Wiretapping

Earlier this month I blogged about a wiretapping scandal in Greece.

Unknowns tapped the mobile phones of about 100 Greek politicians and offices, including the U.S. embassy in Athens and the Greek prime minister.

Details are sketchy, but it seems that a piece of malicious code was discovered by Ericsson technicians in Vodafone’s mobile phone software. The code tapped into the conference call system. It “conference called” phone calls to 14 prepaid mobile phones where the calls were recorded.

More details are emerging. It turns out that the “malicious code” was actually code designed into the system. It’s eavesdropping code put into the system for the police.

The attackers managed to bypass the authorization mechanisms of the eavesdropping system, and activate the “lawful interception” module in the mobile network. They then redirected about 100 numbers to 14 shadow numbers they controlled. (Here are translations of some of the press conferences with technical details. And here are details of the system used.)

There is an important security lesson here. I have long argued that when you build surveillance mechanisms into communication systems, you invite the bad guys to use those mechanisms for their own purposes. That’s exactly what happened here.

UPDATED TO ADD (3/2): From a reader: “I have an update. There is some news from the ‘Hellenic Authority for the Information and Communication Security and Privacy’ with a few facts and I got a rumor that there is a root backdoor in the telnetd of Ericssons AXE backdoor. (No, I can’t confirm the rumor.)”

Posted on March 1, 2006 at 8:04 AM • View Comments

Phone Tapping in Greece

Unknowns tapped the mobile phones of about 100 Greek politicians and offices, including the U.S. embassy in Athens and the Greek prime minister.

Details are sketchy, but it seems that a piece of malicious code was discovered by Ericsson technicians in Vodafone’s mobile phone software. The code tapped into the conference call system. It “conference called” phone calls to 14 prepaid mobile phones where the calls were recorded.

Some details are here. See also this news article, and—if you can read Greek—this one.

Posted on February 3, 2006 at 11:27 AM • View Comments

Anyone Can Get Anyone’s Phone Records

Interested in who your spouse is talking to? Your boss? A celebrity? A politician?

The Chicago Police Department is warning officers their cell phone records are available to anyone—for a price. Dozens of online services are selling lists of cell phone calls, raising security concerns among law enforcement and privacy experts….

How well do the services work? The Chicago Sun-Times paid $110 to Locatecell.com to purchase a one-month record of calls for this reporter’s company cell phone. It was as simple as e-mailing the telephone number to the service along with a credit card number. The request was made Friday after the service was closed for the New Year’s holiday.

On Tuesday, when it reopened, Locatecell.com e-mailed a list of 78 telephone numbers this reporter called on his cell phone between Nov. 19 and Dec. 17. The list included calls to law enforcement sources, story subjects and other Sun-Times reporters and editors.

EDITED TO ADD (1/9): More information on BoingBoing.

EDITED TO ADD (1/9): Also see this on EPIC West.

EDITED TO ADD (1/14): Daniel Solove has some good commentary.

Posted on January 9, 2006 at 6:59 AM • View Comments