A Key Management Scheme for Multicast Based on Layer 2 Control

This paper presents a key management scheme for multicast based on layer 2 control, which includes multicast authentication, secure multicast forwarding tree management, key distribution when users are initialized and periodical key updating. This scheme offers a set of methods for key distribution and updating with MLD snooping mechanism and MLD report filtering on access switches. This method reduces the complexity of the key updating problem when members leave the group by layer 2 control and guarantees the efficiency and security of key management. Compared with other schemes, this scheme performs better on computation cost and communication cost than them and has acceptable storage cost.