On 1 déc. 08, at 14:47, Dario Teixeira wrote:

> I reckon that by saying "how good 128 bits MD5 hashes were"
> you are aware of the recent attacks that make MD5's effective
> security less than 128-bit.  The Wikipedia has a good summary:
> http://en.wikipedia.org/wiki/MD5

Thanks for the link. I knew of the attacks but did not know they had  
gotten so good. But I don't think this applies here, as the hashes I'm  
looking at are the one used by Unison to identify file contents.

Alan