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#nsa

11 posts

16 Aug 2015

Matthew Green 5 min read

Yesterday the New York Times and ProPublica posted a lengthy investigation based on leaked NSA documents, outlining the extensive surveillance collaboration between AT&T and the U.S. government. This surveillance includes gems such as AT&T’s assistance in tapping the main fiber connection supporting the United Nations, and that’s only the start. The usual Internet suspects are arguing … Continue reading The…

nsa

22 May 2015

Matthew Green 13 min read

In case you haven’t heard, there’s a new SSL/TLS vulnerability making the rounds. Nicknamed Logjam, the new attack is ‘special’ in that it may admit complete decryption or hijacking of any TLS connection you make to an improperly configured web or mail server. Worse, there’s at least circumstantial evidence that similar (and more powerful) attacks might already be … Continue…

attacksnsatls ssl

29 Dec 2014

Matthew Green 8 min read

If you don’t follow NSA news obsessively, you might have missed yesterday’s massive Snowden document dump from Der Spiegel. The documents provide a great deal of insight into how the NSA breaks our cryptographic systems. I was very lightly involved in looking at some of this material, so I’m glad to see that it’s been … Continue reading On the…

backdoorsnsatls ssltor

25 Jan 2014

Matthew Green 1 min read

This week a group of more than fifty prominent security and cryptography researchers signed a letter protesting the mass surveillance efforts of the NSA, and attempts by NSA to weaken cryptography and privacy protections on the Internet. The full letter can be found here. Most of you have already formed your own opinions on the issue over … Continue reading…

nsasecurity research

28 Dec 2013

Matthew Green 5 min read

Last Friday, Joseph Menn from Reuters published an article claiming that RSA, the pioneering security firm and division of EMC, accepted $10 million dollars to include the Dual EC random number generator as the default in their flagship BSAFE library. I’ve written a bit about Dual EC on this blog, so readers will know that I don’t think highly ……

dual ecnsarngs

3 Dec 2013

Matthew Green 12 min read

A few weeks ago I wrote a long post about the NSA’s ‘BULLRUN’ project to subvert modern encryption standards. I had intended to come back to this at some point, since I didn’t have time to discuss the issues in detail. But then things got in the way. A lot of things, actually. Some of which … Continue reading How…

nsatls ssl

20 Sept 2013

Matthew Green 3 min read

In today’s news of the weird, RSA (a division of EMC) has recommended that developers desist from using the (allegedly) ‘backdoored’ Dual_EC_DRBG random number generator — which happens to be the default in RSA’s BSafe cryptographic toolkit. Youch. In case you’re missing the story here, Dual_EC_DRBG (which I wrote about yesterday) is the random number generator voted most likely to…

dual ecnsarngs

18 Sept 2013

Matthew Green 13 min read

The Dual_EC_DRBG generator from NIST SP800-90A. Update 9/19: RSA warns developers not to use the default Dual_EC_DRBG generator in BSAFE. Oh lord. As a technical follow up to my previous post about the NSA’s war on crypto, I wanted to make a few specific points about standards. In particular I wanted to address the allegation that … Continue reading The…

dual ecnsarngs

10 Sept 2013

Matthew Green 2 min read

Readers of this blog will know this has been an interesting couple of days for me. I have very mixed feelings about all this. On the one hand, it’s brought this blog a handful of new readers who might not have discovered it otherwise. On the other hand, it’s made me a part of the … Continue reading A note…

nsa

6 Sept 2013

Matthew Green 9 min read

Let me tell you the story of my tiny brush with the biggest crypto story of the year. A few weeks ago I received a call from a reporter at ProPublica, asking me background questions about encryption. Right off the bat I knew this was going to be an odd conversation, since this gentleman seemed … Continue reading On the…

nsaprivacy

17 Jun 2013

Matthew Green 8 min read

Over the past week or so there’s been a huge burst of interest in encryption software. Applications like Silent Circle and RedPhone have seen a major uptick in new installs. CryptoCat alone has seen a zillion new installs, prompting several infosec researchers to nearly die of irritation. From my perspective this is a fantastic glass of lemonade, if one made…

messagingnsa