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Re: passwd hashing algorithm
From: watt () sware com (Charlie Watt)
Date: Thu, 20 Apr 1995 14:59:58 -0400 (EDT)


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X-Sensitivity-Label: 1,CMW+3.0/SCO_2.1/sware.com,UNCLASSIFIED
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Charlie Watt <watt () sware com>

As you point out, a better cryptographic linkage between blocks would 
force the attacker to search the full password space for a given multiblock
password rather than break it down into separate 8 byte searches.  We will 
incoporate this into our next release.  Thanks for the feedback.  

Why not just use md5 instead?

-Dave

We provide hooks into the password mechanism so that an installation
can easily insert a site specific hashing scheme.  The default mechanism
is based upon crypt() purely for marketing reasons -- that is the
way it has always been done and that is the way that most customers
feel comfortable.  It seems that "extensions" to the hash using crypt()
that work the same as standard Unix for passwords <= 8 bytes but that can 
also accommodate longer passwords is an easier sell than something perceived 
as radically new and unproven.  We do have more sophisticated customers who 
prefer to install their own algorithms.  MD5 would be a reasonable choice, 
but even it would be judged inadequate (ONLY a 16 byte password hash space!)
by some customers.

Charlie Watt
SecureWare, Inc.
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