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Article View: comp.security.misc
Article #552

Re: Tripwire release

#552
From: Gene Spafford
Date: Sun, 15 Nov 1992 18:56
27 lines
2123 bytes
In article <1992Nov13.004708.26881@cs.sandia.gov> mccurley@cs.sandia.gov (Kevin McCurley) writes:

   From: mccurley@cs.sandia.gov (Kevin McCurley)
   Newsgroups: comp.security.misc,alt.security,comp.unix.admin
   Date: 13 Nov 92 00:47:08 GMT

   I stated earlier that NONE of these, including MD5, Snefru, and MD4,
   are signatures in the cryptographic sense.  A true signature would
   require something like RSA or DSA layered on a one-way hash function
   like MD5 or SHA.

We have seen the word "signature" used in different ways in the
literature and the general user community.  Our use of the word in the
Tripwire documentation was in the sense of other uses we had seen.
Perhaps we should put little quote marks around the word, or put a
footnote that some people have a more restrictive definition of
signature than what we used....

The basic point made by GeneK was that the program has a
simple-extension feature to include whatever other algorithm you wish.
For instance, if you wish to apply DES in CBC mode, and save the last
64 or 128 bits as a signature, you can (and it doesn't need to be
layered on top of anything else to work).  Or encode using your
favorite RSA key before running the CRC...whatever method you choose.

Is anyone using Tripwire, or is the only traffic about the terminology
used in the README file? :-)
Technical Details
Message-ID: <SPAF.92Nov15135616@uther.cs.purdue.EDU>
Path: arc1-ca.pugleaf.net!sparky!uunet!gatech!usenet.ins.cwru.edu!agate!spool.mu.edu!sdd.hp.com!news.cs.indiana.edu!noose.ecn.purdue.edu!mentor.cc.purdue.edu!purdue!spaf
References: <1992Nov6.161125.10283@ghost.dsi.unimi.it> <1992Nov06.173036.28994@watson.ibm.com> <BxMEuE.CwC@mentor.cc.purdue.edu> <1992Nov13.004708.26881@cs.sandia.gov>

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Newsgroups: comp.security.misc,alt.security,comp.unix.admin
Path: arc1-ca.pugleaf.net!sparky!uunet!gatech!usenet.ins.cwru.edu!agate!spool.mu.edu!sdd.hp.com!news.cs.indiana.edu!noose.ecn.purdue.edu!mentor.cc.purdue.edu!purdue!spaf
From: spaf@cs.purdue.EDU (Gene Spafford)
Subject: Re: Tripwire release
In-Reply-To: mccurley@cs.sandia.gov's message of 13 Nov 92 00:47:08 GMT
Message-ID: <SPAF.92Nov15135616@uther.cs.purdue.EDU>
Sender: news@mentor.cc.purdue.edu (USENET News)
Organization: Department of Computer Sciences, Purdue University
References: <1992Nov6.161125.10283@ghost.dsi.unimi.it>
 <1992Nov06.173036.28994@watson.ibm.com>
 <BxMEuE.CwC@mentor.cc.purdue.edu>
 <1992Nov13.004708.26881@cs.sandia.gov>
Date: Sun, 15 Nov 1992 18:56:16 GMT
Lines: 27