Fortezza

Fortezza is an information security system that uses the Fortezza Crypto Card, a PC Card-based security token. It was developed for the U.S. government's Clipper chip project and has been used by the U.S. Government in various applications.
Each individual who is authorized to see protected information is issued a Fortezza card that stores private keys and other data needed to gain access. It contains an NSA approved security microprocessor called Capstone (MYK-80) that implements the Skipjack encryption algorithm.