[Cryptography] Sony finding SHA1 collisions?

[Paul Hoffman]

On Dec 12, 2014, at 11:47 AM, Dennis E. Hamilton <dennis.hamilton at acm.org> wrote:
>     Of course, there has been progress in manipulating a file
>     so that its SHA1 matches a given hash value.

I had not heard that any progress had been made on reducing the preimage strength of SHA-1, or even that of the otherwise-derided MD5. Pointers to such progress would be greatly appreciated.

--Paul Hoffman