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. -- Sponsor the DES Analytic Crack Project http://www.cyberspace.org/~enoch/crakfaq.html