A novel Conference Key Management solution for Secure Dynamic Conferencing

Conference Key Management (CKM) is one of the primary issues in Secure Dynamic Conferencing (SDC). In this paper, we propose a novel CKM scheme for SDC based on the secret sharing principle and the novel concept/introduction of randomised access polynomial. Our scheme is simple, efficient, scalable, practical, dynamic and outperforms existing CKM schemes in overall comparison. Furthermore, if t or less users collude, the new scheme is unconditionally secure and able to defend against their collusions. The storage (O(1) at user end), computation and communication efficiency of the new scheme makes it well suited for the networks with low power devices.