Information Assurance

Appendix 14.A. Secure Group Communication

For the secure link-state routing protocol problem, we have recently proposed a novel key chain–based secure group key management scheme [18]. Our approach captures the merits of both centralized and distributed approaches and targets minimizing the communication and delay overhead due to key management that is critical in link-state flooding. Briefly, a set of secrets are first distributed to each user (node) from a centrally controlled key server before the secure group communication phase. During the actual communication, every group member can self-derive desired group/subgroup keys and then communicate with any possible subgroups without any help from the key server. Our work in many-to-many secure ...