A mutual certification method includes an IC card having a random number generator, a plurality of key data and a plurality of encryption algorithms, and an IC card terminal which also has a random number generator, a plurality of key data and a plurality of encryption algorithms. The key data and encryption...http://www.google.de/patents/US5293029?utm_source=gb-gplus-sharePatent US5293029 - System for mutually certifying an IC card and an IC card terminal
