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In a post on Wednesday, researchers Alex Halderman and Nadia Heninger presented compelling research suggesting that the NSA has developed the capability to decrypt a large number of HTTPS, SSH, and VPN connections using an attack on common implementations of the Diffie-Hellman key exchange algorithm with 1024-bit primes. Earlier in the year, they were part of a research group that published a study of the Logjam attack, which leveraged overlooked and outdated code to enforce "export-grade" (downgraded, 512-bit) parameters for Diffie-Hellman. By performing a cost analysis of the algorithm with stronger 1024-bit parameters and comparing that with what we know of the NSA "black budget" (and reading between the lines of several leaked documents about NSA interception capabilities) they concluded that it's likely NSA has been breaking 1024-bit Diffie-Hellman for some time now. The good news is, in the time since this research was originally published, the major browser vendors (IE, Chrome, and Firefox) have removed support for 512-bit Diffie-Hellman, addressing the biggest vulnerability. However, 1024-bit Diffie-Hellman remains supported for the forseeable future despite its vulnerability to NSA surveillance. In this post, we present some practical tips to protect yourself from the surveillance machine, whether you're using a web browser, an SSH client, or VPN software. Disclaimer: This is not a complete guide, and not all software is covered.

Static blocks of text like the one you’re looking at now are an antiquated and inefficient way to get words into your head. That’s the contention of Boston-based startup Spritz, which has developed a speed-reading text box that shows no more than 13 characters at a time. The Spritz box flashes words at you in quick succession so you don’t have to move your eyes around a page, and in my very quick testing it allowed me to read at more than double my usual reading pace. Spritz has teamed up with Samsung to integrate its speed reading functionality with the upcoming Galaxy S5 smartphone. The written word, after 8,000 or so years, is still an extremely effective way to get a message from one mind into the minds of others. But even with the advent of the digital age and decades of usability work, font and layout development, we’re still nowhere near optimal efficiency with it yet.