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SubjectRe: Lockless file reading
Date
> 
> Ragnar Hojland Espinosa wrote:
> > It can happen. It happened to me with two gifs. FWIW.
>
> Probability on the order of 2^-32 with MD5 any-pairs collision.
> (It's not usual to have so many GIFs to compare, though :)
> SHA is better, and both probably have some weakness that increases the
> probability of collision.
>
> Do you still have the GIFs?

MD5 is 128 bit output, so that's around 2^64 pairs before you have a birthday.
There arn't that many GIFs in the world.
I'd be really surprised if there were that many pictures in the world.
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