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- Path: sparky!uunet!mcsun!uknet!acorn!eoe!ahaley
- From: ahaley@eoe.co.uk (Andrew Haley)
- Newsgroups: sci.crypt
- Subject: Re: IDEA cipher (was: PGP 2.0 Announcement)
- Message-ID: <1407@eouk23.eoe.co.uk>
- Date: 11 Sep 92 21:45:37 GMT
- References: <1992Sep11.085627.26861@cs.aukuni.ac.nz>
- Organization: EO Europe Limited, Cambridge, UK
- Lines: 42
- X-Newsreader: Tin 1.1 PL5
-
- Peter Gutmann (pgut1@cs.aukuni.ac.nz) wrote:
- : In <1398@eouk9.eoe.co.uk> ahaley@eoe.co.uk (Andrew Haley) writes:
- :
- : >Yes, IDEA has a 128 bit key. It's rather beautiful algorithm,
- : >involving multiplications mod 65537 (which is prime, so the
- : >multiplications are invertible because every number (except zero) has
- : >an inverse mod a prime), additions mod 65536, and XORs. These
- : >operations are combined in a network which thoroughly scrambles the
- : >data. There are no table lookups or bit permutations at all.
- : >
- : >BAD NEWS: It's PATENTED. Not just in the USA but in Europe as well.
- : >If enforced, this patent will probably prevent the widespread adoption
- : >of this algorithm. A great shame.
- :
- : However the patent owners, Ascom-Tech AG, are being very reasonable about
- : the patent (totally unlike PKP). They let us use it in PGP without having
- : to pay any license fees since PGP is free, and are very approachable about
- : it's use in other programs. Still, I ended up not using it in my PGP-compatible
- : archiver since I have a religious thing about patents - however, IDEA is a very
- : good cipher and the way the patent is being administered is one of the more
- : enlightened I've seen.
-
- I utterly disagree. There is no way to describe the enforcement of an
- algorithm patent as "enlightened". It's like saying "Frank is a good
- jailer, he doesn't tie my shackles too tight". They (the IDEA
- licensors) _do not_ allow the free use in PGP in general, only in
- noncommercial cases. Which means that you and I can communicate with
- PGP until we wish to discuss business; then we have to start paying
- money.
-
- I am not opposed to the copyrighting of code, but algorithm patents
- are a way to prevent the application of ideas, something we haven't
- seen since the dark ages.
-
- Followups to comp.patents.
-
- :
- : Peter.
-
- Andrew.
-
- P.S. Support the League for Programming Freedom!
-