2 files, 2 sizes, identical md5sums
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From: gamename on 22 Apr 2008 14:11 Hi, Is it possible to have 2 files that are different sizes, but have the same md5sum value? TIA, -T
From: David R Brooks on 22 Apr 2008 14:12 gamename wrote: > Hi, > > Is it possible to have 2 files that are different sizes, but have the > same md5sum value? > Quite possible, though rather unlikely.
From: Hal Murray on 22 Apr 2008 14:16 >Is it possible to have 2 files that are different sizes, but have the >same md5sum value? Yes, but it's very very ... very unlikely. In particular, it's very hard for a bad-guy to make a second file with the same md5sum. One idea is to be hard to forge documents for example a check with a big payment starting with a valid check, or to install malware in software distributions. -- These are my opinions, not necessarily my employer's. I hate spam.
From: d.salemno on 22 Apr 2008 17:01 On Apr 22, 2:11 pm, gamename <namesagame-use...(a)yahoo.com> wrote: > Hi, > > Is it possible to have 2 files that are different sizes, but have the > same md5sum value? > > TIA, > -T The odds of this happening are very rare indeed. The md5 hash is calculated via a mathematical algorithm and has a set length. I will not jump into the finer details of the algorithm, but yes it can happen. - Dominic Salemno
From: Unruh on 22 Apr 2008 20:29
gamename <namesagame-usenet(a)yahoo.com> writes: >Hi, >Is it possible to have 2 files that are different sizes, but have the >same md5sum value? Yes. Any two files, each of arbitrary size (at least one >40 bytes) will have roughly a 1/1000000000000000000000000000000000000000 chance of having the same MD5 sum. >TIA, >-T |