A Scalable Conference Key Management Scheme

The most important part of a secure conference is conference key management (CKM). Among its representative schemes, the de-centralized one inherits the merits of others. But current solutions are not very suitable for some real-time multicast applications such as videoconference, etc. In this paper, we present a scalable de-centralized CKM scheme, which called DCKM, the main idea is introduced and its advantages are analyzed. With our scheme, the problem of low efficiency in data transmission caused by multiple encryptions/decryptions in existing de-centralized schemes is solved, the data transmission efficiency is improved a lot, and the data latency is reduced. The forward/backward secrecy of conference is guaranteed, too. The DCKM is a secure, robust, scalable, high data transmission efficiency, cost effective CKM scheme.