Access and storage of secure group communication cryptographic keys

摘要

A method and apparatus for secure group communication detects the deletion of a member of the group and uses the detected deletion to update the security credentials of a group by updating a repository containing credentials of members of a group. Alternatively, updating of the security credentials may be performed by sending a group credential deletion request for a member that has been deleted from the group so that the member deletes a stored copy of the group security credential.