Drip, Drip, Drip

The [NSA] has circumvented or cracked much of the encryption, or digital scrambling, that guards global commerce and banking systems, protects sensitive data like trade secrets and medical records, and automatically secures the e-mails, Web searches, Internet chats and phone calls of Americans and others around the world, the documents show.

[...]

Beginning in 2000, as encryption tools were gradually blanketing the Web, the N.S.A. invested billions of dollars in a clandestine campaign to preserve its ability to eavesdrop. Having lost a public battle in the 1990s to insert its own “back door” in all encryption, it set out to accomplish the same goal by stealth.

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In some cases, companies say they were coerced by the government into handing over their master encryption keys or building in a back door. And the agency used its influence as the world’s most experienced code maker to covertly introduce weaknesses into the encryption standards followed by hardware and software developers around the world.

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When the British analysts, who often work side by side with N.S.A. officers, were first told about the program, another memo said, “those not already briefed were gobsmacked!”

An intelligence budget document makes clear that the effort is still going strong.

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“The risk is that when you build a back door into systems, you’re not the only one to exploit it,” said Matthew D. Green, a cryptography researcher at Johns Hopkins University. “Those back doors could work against U.S. communications, too.”

Paul Kocher, a leading cryptographer who helped design the SSL protocol, recalled how the N.S.A. lost the heated national debate in the 1990s about inserting into all encryption a government back door called the Clipper Chip.

“And they went and did it anyway, without telling anyone,” Mr. Kocher said.

[...]

N.S.A. documents show that the agency maintains an internal database of encryption keys for specific commercial products, called a Key Provisioning Service, which can automatically decode many messages. If the necessary key is not in the collection, a request goes to the separate Key Recovery Service, which tries to obtain it.

How keys are acquired is shrouded in secrecy, but independent cryptographers say many are probably collected by hacking into companies’ computer servers, where they are stored. To keep such methods secret, the N.S.A. shares decrypted messages with other agencies only if the keys could have been acquired through legal means.

Even agency programs ostensibly intended to guard American communications are sometimes used to weaken protections. The N.S.A.’s Commercial Solutions Center, for instance, invites the makers of encryption technologies to present their products to the agency with the goal of improving American cybersecurity. But a top-secret N.S.A. document suggests that the agency’s hacking division uses that same program to develop and “leverage sensitive, cooperative relationships with specific industry partners” to insert vulnerabilities into Internet security products.

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“Properly implemented strong crypto systems are one of the few things that you can rely on,” [Edward Snowden] said, though cautioning that the N.S.A. often bypasses the encryption altogether by targeting the computers at one end or the other and grabbing text before it is encrypted or after it is decrypted. 

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The documents are among more than 50,000 shared by The Guardian with The New York Times and ProPublica, the nonprofit news organization.

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Intelligence officials asked The Times and ProPublica not to publish this article, saying it might prompt foreign targets to switch to new forms of encryption or communications that would be harder to collect or read. The news organizations removed some specific facts but decided to publish the article because of the value of a public debate about government actions that weaken the most powerful privacy tools.

  NYT

Also: Report on these documents from Glenn Greenwald at the Guardian.