Re: RC6 legal status

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Perry E. Metzger (perry@piermont.com)
Fri, 07 Aug 1998 09:57:53 -0400


Berke Durak writes:
> I was considering using RC6 as a strong PRNG, however I was told that
> RC6 is patented by RSADSI and that this might cause problems in the
> future. Since RC6 is actually an AES submission, and since AES requires
> the candidate algorithms to be licence-free (or am I wrong?) I thought
> it would be ok to use it. Any info ?

There is dispute over what the exact status is, but the general answer
is that AES submissions only have to agree to give up rights IF THEY
ARE ACCEPTED. RC6 is not yet the AES, so it is still proprietary.

> PS.I was advised to use RC4 instead.

RC4 is not a comparable algorithm. It is a stream cipher.

Perry


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The following archive was created by hippie-mail 7.98617-22 on Sat Apr 10 1999 - 01:10:56