Re: reducing our reliance on MD5

On 02/11/2015 06:35 AM, Claudio Freire wrote:
> Usually because handshakes use a random salt on both sides. Not sure
> about pg's though, but in general collision strength is required but
> not slowness, they're not bruteforceable.

To be precise: collision resistance is usually not important for hashes 
used in authentication handshakes. Not for our MD5 authentication method 
anyway; otherwise we'd be screwed. What you need is resistance to 
pre-image attacks.

See https://en.wikipedia.org/wiki/Cryptographic_hash_function#Properties

- Heikki