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Re: SHA1 showing it's age

Subject: Re: SHA1 showing it's age
Date: Tue, 22 Feb 2005 16:34:23 -0500
Kevin.M-ctr.Shannon@faa.gov wrote:


Barry,

Your quoted conversation is hilarious. I think that I had the exact same conversation, regarding duplicate hashes, with a peer when I was in college.
And it ended something like this...


"Yeah, theoretically you could have a duplicate hash on a different file but the odds are so great no one would ever be able to do it."

HAHA It seems that the entire method of cross-checking based on all general hashing techniques must be taken back to the drawing board.

Unless each file is assigned some number analogous to Pi (an infinite number), there will always be a flaw.

At this point, I could lead into an argument that mathematics is inherently flawed because of several reasons:
1. It is a human creation
2. ...3....etc.


But I'll save that for some philosophy list.



Hah - so true.

Though, one has to say that if your hash is an infinite number (or approaching infinite), then why not simply record the precise contents of the file and compare that? It would be more space efficient. :)

      -Barry




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