The invention relates to security for computer systems and a method for protecting computer systems, particularly those employing an encryption for the protection of sensitive information. A cryptographic algorithm is implemented in the protected system using Boolean operations and arithmetic operations...http://www.google.com.au/patents/US7334133?utm_source=gb-gplus-sharePatent US7334133 - Method for making a computer system implementing a cryptographic algorithm secure using Boolean operations and arithmetic operations and a corresponding embedded system
