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- Newsgroups: sci.crypt
- Path: sparky!uunet!mcsun!chsun!bernina!caronni
- From: caronni@nessie.cs.id.ethz.ch (Germano Caronni)
- Subject: Re: PGP technical question (Not a flame)
- Message-ID: <1992Dec22.105243.9533@bernina.ethz.ch>
- Sender: news@bernina.ethz.ch (USENET News System)
- Organization: Swiss Federal Institute of Technology (ETH), Zurich, CH
- References: <168C413C13.UC445585@mizzou1.missouri.edu>
- Date: Tue, 22 Dec 1992 10:52:43 GMT
- Lines: 42
-
- In article <168C413C13.UC445585@mizzou1.missouri.edu> UC445585@mizzou1.missouri.edu (John M. Kelsey) writes:
- > Why did PGP change from bassomatic to IDEA? Where can I find references
- >to IDEA? (It's Swiss?)
- I assume they changed to it, because it's _not_ DES :-) , has a 128-bit
- key, and is 'a little bit' faster than e.g. DES.
-
- It is swiss.
-
- PGP says:
- The IPES/IDEA block cipher was developed at ETH in Zurich by James L.
- Massey and Xuejia Lai, and published in 1990.
- Early published papers on
- the algorithm called it IPES (Improved Proposed Encryption Standard),
- but they later changed the name to IDEA (International Data
- Encryption Algorithm).
-
- Idea Sources say:
- The IDEA(tm) block cipher is covered by a patent held by ETH and a
- Swiss company called Ascom-Tech AG. The Swiss patent number is
- PCT/CH91/00117. International patents are pending. IDEA(tm) is a
- trademark of Ascom-Tech AG. There is no license fee required for
- noncommercial use. Commercial users may obtain licensing details
- from Dieter Profos, Ascom Tech AG, Solothurn Lab, Postfach 151, 4502
- Solothurn, Switzerland, Tel +41 65 242885, Fax +41 65 235761.
-
- For further information on the IDEA cipher, see these papers:
- 1) Xuejia Lai, "Detailed Description and a Software Implementation of
- the IPES Cipher", Institute for Signal and Information
- Processing, ETH-Zentrum, Zurich, Switzerland, 1991
- 2) Xuejia Lai, James L. Massey, Sean Murphy, "Markov Ciphers and
- Differential Cryptanalysis", Advances in Cryptology- EUROCRYPT'91
-
- I hope this helps you, if You __really__ need 1) as paper-mail, send
- me a mail.
-
- Friendly greetings,
- /Gec
- --
- Instruments register only through things they're designed to register.
- Space still contains infinite unknowns.
-
- Germano Caronni caronni@nessie.cs.id.ethz.ch
-