Re: Wikileaks video crypto.
On Fri, Apr 9, 2010 at 13:06, Perry E. Metzger pe...@piermont.com wrote: The video was apparently intentionally given to Wikileaks, so one can't imagine that the releasing parties would have wanted it to be unreadable by them (or that any reasonable modern cryptosystem would have be crackable). What, then, does the decryption claim mean here. Does anyone know? majord...@metzdowd.com This site http://leaks.telecomix.org/ claims to have the original, unencrypted video. It appears to have been encrypted with OpenSSL given the Salted__ prefix. -- Thomas Coppi - The Cryptography Mailing List Unsubscribe by sending unsubscribe cryptography to majord...@metzdowd.com
Re: [tahoe-dev] SHA-1 broken!
On Sun, May 3, 2009 at 4:35 PM, Christian Rechberger christian.rechber...@tugraz.at wrote: The design of DES facilitates this kind of throughput/cost gains on FPGAs. Remember that the MD4 family (incl. SHA-1) was designed to be efficient on 32-bit CPUs. For these hash functions, it is much harder to get a throughput/cost gain on FPGAs compared to off-the-shelf CPUs. At least, this was my conclusion when I quickly looked into this a few years ago. The n...@home project(http://nsa.unaligned.org/) seems to do it pretty well. He even provides the optimized SHA-1 and MD5 Verilog code used. This only works because straight-up bruteforce requires little memory, though. If the new SHA-1 break requires significant memory usage I don't think something like the COPACOBANA can help. Regards, -- Thomas Coppi - The Cryptography Mailing List Unsubscribe by sending unsubscribe cryptography to majord...@metzdowd.com
Re: Proof of Work - atmospheric carbon
On Wed, Jan 28, 2009 at 2:19 PM, John Levine jo...@iecc.com wrote: Indeed. And don't forget that through the magic of botnets, the bad guys have vastly more compute power available than the good guys. Just out of curiosity, does anyone happen to know of any documented examples of a botnet being used for something more interesting than just sending spam or DDoS? -- Thomas Coppi - The Cryptography Mailing List Unsubscribe by sending unsubscribe cryptography to majord...@metzdowd.com
