SHA-1 Freestart Collisions
The Freestart collision for full SHA-1 paper was released by Marc Stevens, Pierre Karpman and Thomas Peyrin. This is not a collision attack on the SHA-1 function itself, but on the compression function that underlies it. The research paper states "Freestart collisions, like the one presented here, do not directly imply a collision for SHA-1. However, this work is an important milestone towards an actual SHA-1 collision and it further shows how graphics cards can be used very efficiently for these kind of attacks."