RC6 & AES patent status

proff@iq.org
Mon, 20 Jul 1998 22:55:55 +1000 (EST)

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> >Can someone tell me what the patent situation is with RC6, given that RC5
> >is patented?
>
> I think one of the requirements for the AES is for the algo to be
> unincumbered, but I may be wrong. Best to chaeck with RSADSI on this.
>
> William H. Geiger III http://users.invweb.net/~whgiii

My recollection of the AES criteria was that NIST would `look' at patented
algorithms (presumably with free licensing for USG) but would `prefer'
to select an unpatented one.

Cheers,
Julian.

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