Distributed Dynamic Multicast Key Management Scheme Based on Grouped Linked List

Multicast technology can establish point-to-multipoint network connections among multicast group members, which can effectively solve the problems of communication transmission from single point to multi-point and is widely used in the field of internet information service. Multicast key management is the key to secure multicast communication. With the increment of multicast group members, the key technologies in existing multicast key management schemes, such as session key agreement among group members and the key update caused by dynamic changes of group members, are facing new challenges. Most of the existing multicast key management schemes rely on the logical key tree, which is not suitable for networks with many group members. In this paper, based on a hierarchical distributed mechanism, a dynamic multicast key management scheme based on a grouped linked list is proposed using timestamps, hash functions, elliptic curve cryptosystems, etc. The proposed scheme is proved secure in formal analysis based on BAN logic. Security characteristics analysis shows that the proposed scheme is suitable for multicast communication with large-scale dynamic groups with high-security performance. It can provide confidentiality, forward security, and backward security in multicast communication and resist replay attacks and conspiracy attacks. Meanwhile, the proposed scheme improves the efficiency in agreement and updates the group session key. © 2022,International Journal of Network Security. All Rights Reserved.