Secure One-to-Group Communications Escrow-Free ID-Based Asymmetric Group Key Agreement

摘要: Group key agreement (GKA) is widely employed for secure group communications. Yet there an increasing demand one-to-group communications in distributed computing applications. Asymmetric (AGKA) a handy tool to answer this need. In AGKA, of members can establish public while each member has different secret key. Any sender encrypt under such that any the who hold decrypt. This paper proposes identity-based AGKA protocol which against active attackers, with emphasis on optimal round efficiency, dynamics, and escrow freeness. The last feature offers security previously established ciphertexts even when either all involved participants or generation center cryptosystem are compromised. proposed shown be \(k\)-Bilinear Diffie-Hellman exponent assumption random oracle model. Regarding performance, our comparable state-of-the-art protocols.