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From: shep@mit-eddie.MIT.EDU (Tim Shepard)
Newsgroups: net.crypt
Subject: Re: password salt
Message-ID: <2759@mit-eddie.MIT.EDU>
Date: Fri, 1-Aug-86 17:04:08 EDT
Article-I.D.: mit-eddi.2759
Posted: Fri Aug  1 17:04:08 1986
Date-Received: Sat, 2-Aug-86 10:57:58 EDT
References: <2743@mit-eddie.MIT.EDU>
Organization: M.I.T. EE/CS Computer Facility, Cambridge MA
Lines: 15


The original message posted by Bob Baldwin and I contains an error.

We forgot to take into account the fact that only the low 12 bits of
the salt are used after the multiplication by 9.  The effect of only
using the low 12 bits effectively makes the salt equivalent to

salt = (9 * getpid()) % 4096

which can take on 4096 different values since 9 is relatively prime to
4096 and assuming that getpid() will return any value.

				Tim Shepard
				SHEP@XX.LCS.MIT.EDU
				...!ihnp4!mit-eddie!shep