mocell Posted December 18, 2015 Report Share Posted December 18, 2015 I keep hearing about how the sha-1 algorithm is now practically broken and now all these certificate authorities are going force everyone to go to sha-256 as of next year. I know that a preimage attack doesn't really work on bittorrent but I have heard about attack called a freestart attack what is it and is it possible an attacker like sony could use it on bittorrent? Link to comment Share on other sites More sharing options...
DreadWingKnight Posted December 18, 2015 Report Share Posted December 18, 2015 An attack against the BitTorrent protocol requires a LOT more than a generic collision in SHA1. Collision against the torrent's infohash itself is orders of magnitude more complex than a plain SHA1 collision attack due to the large number of characters that MUST be in the payload. Collision against an individual piece is more complicated than a plain SHA1 collision due to the fact that the piece's size is known. The collision payload MUST be the same length. Link to comment Share on other sites More sharing options...
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