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- From: owens@acsu.buffalo.edu (Bill Owens)
- Newsgroups: comp.security.misc,alt.security,comp.unix.admin
- Subject: Re: Tripwire release
- Message-ID: <Bx8757.HoF@acsu.buffalo.edu>
- Date: 5 Nov 92 04:29:30 GMT
- References: <1992Nov4.203802.10885@cs.sandia.gov>
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- Kevin McCurley (mccurley@cs.sandia.gov) wrote:
- >> spaf@cs.purdue.EDU (Gene Spafford) writes:
- >>This is to announce the first public release of "Tripwire."
- >>Tripwire is an integrity-monitor for Unix systems. It uses several
- >>checksum/signature routines to detect changes to files, as well as
- >
- >I would like to comment that this use of the term "signature" should
- >not be confused with the much stronger term of signature that is
- >common in cryptology literature.
- >
- >You will notice that the
- >Tripwire database needs to be placed in a secure location like on
- >another machine with a read-only disk. If a true digital signature
- >algorithm was used (like DSS or RSA), then this would not be
- >necessary.
-
- Without adding the overhead of a digital signature for each file which
- tripwire is keeping track of, could the program perhaps be set up to
- check a cryptographic signature on the entire database? If the key
- used to make the signature were kept secure, presumably by encrypting
- it, then I think this setup would be equally secure.
-
- Of course, those truly worried would want to make sure that the
- database, the tripwire and signature programs, and the secret key were
- all on ro disks, but I suspect the signature itself would present a
- sufficient hurdle. And certainly machines with floppies can be easily
- set up with a physically secure filesystem, but signatures would
- increase security on machines where no such facilities are available.
-
- Comments?
-
-
- Bill.
- Bill Owens owens@acsu.buffalo.edu
- 104E Computing Center uunet!acsu.buffalo.edu!owens
- Buffalo, NY 12460 716/645-3511
-