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> I know it is nearly impossible to forge a bad hash on some data (sha1 is
> ~80 bits safe), but a coincidental collision between 2 hashes can occur.
> What is the formula to calculate that ?
bitsize / 2
SHA1 has a bit size of 160, so its "true security" is 80 bits.
- --
Imagine if every Thursday your shoes exploded if you tied them the usual
way. This happens to us all the time with computers, and nobody things of
complaining.
--Jeff Raskin
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