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- Path: sparky!uunet!spool.mu.edu!darwin.sura.net!news.larc.nasa.gov!icat.larc.nasa.gov!palmer
- From: palmer@icat.larc.nasa.gov (Michael T. Palmer)
- Newsgroups: sci.crypt
- Subject: Real question re DES vs IDEA cipher
- Date: 24 Dec 1992 16:39:29 GMT
- Organization: NASA Langley Research Center, Hampton, VA USA
- Lines: 26
- Distribution: world
- Message-ID: <1hcp41INNdi4@rave.larc.nasa.gov>
- NNTP-Posting-Host: icat.larc.nasa.gov
- Originator: palmer@icat.larc.nasa.gov
-
- I just read in the RIPEM FAQ that DES uses a key length that "should be
- reasonably safe against an opponent smaller than a large corporation or
- government agency."
-
- Ack.
-
- I don't get warm fuzzy feelings from this statement. So...
-
- What size key does IDEA use? Is the length sufficient to stand up against
- brute force attacks? I mean, if you can brute force it then why bother
- encrypting the session key with RSA (as in PGP and RIPEM)? Nobody has to
- worry about the public key stuff, they can just go right after the plain
- text.
-
- Since I've seen here that IDEA might end up in an update of RIPEM, I was
- just wondering if it offered more security than DES (in CBC mode). Please,
- forgo the legal asides concerning the algorithms and respective export or
- patent laws. I'm just interested in what key sizes the different ciphers
- use.
-
- Thanks.
-
- --
- Michael T. Palmer, M/S 152, NASA Langley Research Center, Hampton, VA 23681
- Voice: 804-864-2044, FAX: 804-864-7793, Email: m.t.palmer@larc.nasa.gov
- RIPEM Public Key now available -- Consider it an envelope for your e-mail
-