Methods for iteratively deriving security keys for communications sessions

摘要: Disclosed are methods for a client, having established one set of security keys, to establish new without communicate with an authentication server. When the client joins group, master session keys derived and made known group's access From server each derive transient used encryption. To change creates “liveness” information sends it client. New from liveness current keys. these This process limits amount data sent using thus effectiveness any statistical attacker.