At 04:10 AM 7/6/96 -0700, you wrote:

MicroPatent, 4 July 96

Systems and methods for protecting software from unlicensed copying and use (Assignee -- Convex Computer Corporation)

...

Assignee: Convex Computer Corporation

Patent Number: 5530752

Issue Date: 1996 06 25

Inventor(s): Rubin, Robert J.

If you would like to purchase a copy of this patent, please call MicroPatent at 800-984-9800.

Copyright 1996, MicroPatent

I think there are already such algorithms in use in Europe. (Why buy the patent, if it's already around?) ----------< fate favors the prepared mind >---------- Remo Pini Fon 1: +41 1 350 28 82 mailto:rp@rpini.com Fon 2: +41 1 465 31 90 http://www.rpini.com/remopini/ Fax: +41 1 350 28 84 --------< words are what reality is made of >--------