You can't have read Applied Cryptography from the mid-90s and not understand this to have been NSA's M.O. from the jump. Bruce Scheier, who was quoted in the Guardian piece about the same story, is America's foremost popularizer of the notion of NSA as crypto's global passive adversary. People who build real cryptosystems have never, ever been allowed to rely on the goodwill of the NSA not to cryptanalyze their systems.

Entire crypto schemes, from the RIPEMD hash to the specific parameter generation mechanism in DSA, are premised on the idea that USG-sponsored crypto concepts aren't inherently trustworthy. Similarly, all of Applied Cryptography was premised on the idea that NSA was decades ahead of commercial and academic crypto.

Of the revelations about NSA, this has to be the least revelatory (it's up/down there with the "revelation" that NSA employs teams of people whose job it is to break into Windows computers); it essentially restates something we were already supposed to have taken for granted.

That's not to say this isn't a fascinating story. It is; just keep it in context. Things to remember:

* You really want to know whether NSA is directly attacking cryptographic primitives or whether they're subverting endpoints. I think if you talk to cryptographers, you'll get a slight bias towards the belief that it's the latter: that there are implementation weaknesses at play here more than fundamental breaks in crypto.

* You want to keep in mind that breaks in cryptosystems represent new knowledge, and that the enterprise of breaking cryptosystems is an issue distinct from the public policy concern of where NSA is allowed to deploy those breaks.

* Bear in mind that in the legacy TLS security model, before things like pinning and TACK, NSA would only require a viable attack on a small subset of CAs to gain (along with pervasive network taps) massive capabilities. The payoff for these kinds of capabilities is radically degraded by the anti-surveillance mechanisms of modern browsers like Chrome, which is something you probably want to be thanking people like Adam Langley, Trevor Perrin, and Moxie Marlinspike for pushing so hard to implement.