A method is provided for writing a record to an optical card. A session key is generated randomly. The session key is encrypted using a private key of a public/private key pair associated with a particular cryptographic-key management device. The record is encrypted using the session key. A serial number...http://www.google.com.au/patents/US20050005108?utm_source=gb-gplus-sharePatent US20050005108 - Cryptographically secure transactions with optical cards
