A method for managing encryption keys in a communication system having a plurality of communication devices includes establishing a set of cryptographic keys for secure communication. Each of the cryptographic keys is associated with a geographic region. A geographic region is determined for a communication...http://www.google.fr/patents/US7539313?utm_source=gb-gplus-shareBrevet US7539313 - System and method for key management across geographic domains
System and method for key management across geographic domains
