“The National Security Agency has had agents in China, Germany, and South Korea working on programs that use “physical subversion” to infiltrate and compromise networks and devices, according to documents obtained by The Intercept. The documents, leaked by NSA whistleblower Edward Snowden, also indicate that the agency has used “under cover” operatives to gain access to sensitive data and systems in the global communications industry, and that these secret agents may have even dealt with American firms. The documents describe a range of clandestine field activities that are among the agency’s “core secrets” when it comes to computer network attacks, details of which are apparently shared with only a small number of officials outside the NSA…In addition to so-called “close access” operations, the NSA’s “core secrets” include the fact that the agency works with U.S. and foreign companies to weaken their encryption systems; the fact that the NSA spends “hundreds of millions of dollars” on technology to defeat commercial encryption; and the fact that the agency works with U.S. and foreign companies to penetrate computer networks, possibly without the knowledge of the host countries. Many of the NSA’s core secrets concern its relationships to domestic and foreign corporations…The agency’s core secrets are outlined in a 13-page “brief sheet” about Sentry Eagle, an umbrella term that the NSA used to encompass its most sensitive programs “to protect America’s cyberspace.“”

• See also UK Guardian – Second leaker in US intelligence, says Glenn Greenwald Citizenfour, new film on spying whistleblower Edward Snowden, shows journalist Greenwald discussing other source: “The investigative journalist Glenn Greenwald has found a second leaker inside the US intelligence agencies, according to a new documentary about Edward Snowden that premiered in New York on Friday night. Towards the end of filmmaker Laura Poitras’s portrait of Snowden – titled Citizenfour, the label he used when he first contacted her – Greenwald is seen telling Snowden about a second source. Snowden, at a meeting with Greenwald in Moscow, expresses surprise at the level of information apparently coming from this new source. Greenwald, fearing he will be overheard, writes the details on scraps of paper. The specific information relates to the number of the people on the US government’s watchlist of people under surveillance as a potential threat or as a suspect. The figure is an astonishing 1.2 million.”