Rivest Patent

[Harvey Rook (Exchange)]

It's a little bit more complicated than that. RC-6, which also uses data
dependant rotations is patent free.

Harv.

> -----Original Message-----
> From: Eric Cordian [mailto:emc at wire.insync.net]
> Sent: Friday, November 13, 1998 11:25 AM
> To: cypherpunks at cyberpass.net
> Subject: Re: Rivest Patent
> 
> 
> JYA writes:
> 
> > Ron Rivest received on November 10 "US Patent 5835600: 
> > Block encryption algorithm with data-dependent rotations:" 
> > http://jya.com/rivest111098.htm (22K) 
> 
> So we can't use the rotate instruction with a data-dependent shift 
> count in a block encryption algorithm without a license from Ron?
> 
> Foo on that.
> 
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