Re: [tor-dev] Is it time to drop support for the v1/v2 protos?

2014-12-28 Thread Nick Mathewson
On Sat, Dec 27, 2014 at 9:38 AM, Tom van der Woerdt wrote: > Hi all, > > After reading the Tor spec [1] I did some digging and realized that the old > handshakes and link protocols (v1 (certs up-front) and v2 (renegotiation)) > are not used anymore as of 0.2.3.6-alpha which introduced link proto v

[tor-dev] ScrambleSuit's replay protection incomplete

2014-12-28 Thread Philipp Winter
In short: The implementation of ScrambleSuit's replay protection is incomplete which means that an active adversary can circumvent it. All the credit for this discovery goes to Lasse Ă˜verlier. ScrambleSuit uses Uniform Diffie-Hellman as one of its authentication mechanisms. To defend against rep