A server and a computer are connected to a network. User data may be used to establish a state between a server and a user operating the computer. Secure network user states includes creating a first key from a received user key; encrypting user data with the cryptographic key; storing the encrypted...http://www.google.fr/patents/US6920560?utm_source=gb-gplus-shareBrevet US6920560 - Secure network user states
