Re: RC5 Patent Awarded

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Bill Stewart (bill.stewart@pobox.com)
Mon, 09 Mar 1998 01:26:10 -0800


At 05:24 PM 3/9/98 +1000, Eric Young wrote:
>
>On Sun, 8 Mar 1998, Bruce Schneier wrote:
>> Patent No 5,724,428 issued on 3 March 1998 to Rivest on "Block
>> Encryption Algorithm With Data Dependent Rotation."
>
>Thats a pity. For the better known block ciphers, it is very fast on
>the Penitum pro/Pentium 2 architecture.
...
>Looks like CAST-128 will probably be it, with the option of RC5-32/12 for
>non-USA people.

It's not clear that RC5 will be a legal option for non-USA people.
Some algorithms, like RSA, are unpatentable because they're disclosed
to the public before the patent applications are made,
but I don't know where RSA* Inc. has applied for patents -
they may be in queue in Australia and Europe, or they may not.
                                Thanks!
                                        Bill
Bill Stewart, bill.stewart@pobox.com
PGP Fingerprint D454 E202 CBC8 40BF 3C85 B884 0ABE 4639


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The following archive was created by hippie-mail 7.98617-22 on Fri Aug 21 1998 - 17:15:55 ADT