Huang, Scott C.-H.Du, Ding-Zhu2020-09-022020-09-022004-06-24https://hdl.handle.net/11299/215621This paper presents various new techniques on secure group communication schemes. We present a new broadcast encryption scheme Arachne, being particularly efficient in multiple revocation, and a node-based key pre-distribution scheme, remedying the key overlapping problem of pool-based schemes. Starting with a detailed analysis on broadcast encryption and group key distribution schemes, we discuss the influence of emph{join} as well as the feasibility of including it in broadcast encryption schemes by means of performing full updating or overprovisioning.en-USReport