A user key management method for a broadcast encryption includes assigning node path identifiers (IDs) to nodes arranged in sequence; assigning random seed value keys to the nodes according to the node path IDs; generating key values by repeatedly applying a hash function to the assigned random seed...http://www.google.fr/patents/US7929705?utm_source=gb-gplus-shareBrevet US7929705 - Method of managing user key for broadcast encryption
Method of managing user key for broadcast encryption
