Patent ID: 8495363
Filing Date: 2013-07-23
Classification: G06F,H04L,H04W

Abstract:
1. A method of securing messages associated with a multicast communication session within a wireless communications system, comprising: determining to update at least one group session key (GSK) parameter for a given multicast group, the at least one GSK parameter configured to permit at least one of encryption, decryption, or authentication of multicast messaging exchanged between members of the given multicast group during a multicast communication session; sending a notification to a plurality of multicast group members of the given multicast group that an update of the at least one GSK parameter for the given multicast group is available; receiving, in response to the notification, a provisioning request from a given one of the plurality of multicast group members that requests the updated at least one GSK parameter, the provisioning request including information specific to the given multicast group member; generating the updated at least one GSK parameter by applying a hashing function based on a secret key that is not shared with the plurality of multicast group members, a randomly generated group-seed value and an identifier of the given multicast group; encrypting the updated at least one GSK parameter; and sending the encrypted, updated at least one GSK parameter to the given multicast group member.