Re: Is MD5 outdated ?
From: Gregory G Rose (ggr_at_qualcomm.com)
Date: 09/19/03
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Date: 18 Sep 2003 15:24:09 -0700
In article <2814m.i93202@archiver.winews.net>,
Juergen Helbing <archiver+sci.crypt@i3w.com> wrote:
>I'm personally _far_ more concerned about "random collisions" -
>which means that two guys are posting a binary with the same MD5.
>
>The good quesation might be: "How good is the reliability for MD5
>as a hash-code ?": We are having > 1e6 binary messages per day
>and the system should work properly for 2-10 years.
You expect the first collision after about 2^64
binaries, so at 1e6 binaries/day you should be
good for 50539024859 years approximately. SHA-1
would last 65536 times longer :-)
Greg.
-- Greg Rose 232B EC8F 44C6 C853 D68F E107 E6BF CD2F 1081 A37C Crypto Mini-FAQ: http://www.schlafly.net/crypto/faq.txt Qualcomm Australia: http://www.qualcomm.com.au
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