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