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- Path: sparky!uunet!charon.amdahl.com!amdahl!fadden
- From: fadden@uts.amdahl.com (Andy McFadden)
- Newsgroups: comp.compression
- Subject: Re: Signature of a Bitmap
- Keywords: bitmap signature
- Message-ID: <8bXI03Tmc3V100@amdahl.uts.amdahl.com>
- Date: 14 Dec 92 22:34:34 GMT
- References: <1992Dec10.121753.6284@cam-orl.co.uk> <3496@accucx.cc.ruu.nl>
- Organization: Amdahl Corporation, Sunnyvale CA
- Lines: 12
-
- In article <3496@accucx.cc.ruu.nl> nevries@accucx.cc.ruu.nl (Nico E de Vries) writes:
- >What you are looking for is not a "signature" but a fingerprint. A very
- >common and also very secure one is the MD5 algorithm which extracts
- >a 16byte fingerprint from a collection of data. It is impossible (well
- >almost) to have two different files with the same MD5 fingerprint.
-
- Glad you threw in the "(well almost)". Otherwise you would have implied
- that any file could be compressed to 16 bytes. Which sounds oddly familiar...
-
- --
- fadden@uts.amdahl.com (Andy McFadden)
- [ Above opinions are mine, Amdahl has nothing to do with them, etc, etc. ]
-