[Cryptography] New attack on SHA-1

[Peter Gutmann]

The IACR ePrint archive has just published a new attack on SHA-1:

  Practical Free-Start Collision Attacks on 76-step SHA-1,
  http://eprint.iacr.org/2015/530

Since it's a free-start attack on the compression function (i.e. you need
control of all input parameters to the function) it's not an attack on the
full SHA-1, but in any case they've implemented it on a GPU (GTX-970) and it
takes less than 5 days runtime to find a collision for 76 rounds.

Peter.