On Tue, 4 Mar 2008, Richard Elling wrote:
>
> Also note: the checksums don't have enough information to
> recreate the data for very many bit changes.  Hashes might,
> but I don't know anyone using sha256.

It is indeed important to recognize that the checksums are a way to 
detect that the data is incorrect rather than a way to tell that the 
data is correct.  There may be several permutations of wrong data 
which can result in the same checksum, but the probability of 
encountering those permutations due to natural causes is quite small.

Bob
======================================
Bob Friesenhahn
[EMAIL PROTECTED], http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/

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