Universally Composable Secure Group Communication.
Youliang Tian, Changgen Peng · 2014
Abstract. This paper analyzes group communication within the universally composable framework. We first propose the group communication model, identity-based signcrytion mod-el and group key distribution model in the UC framework by designing the ideal functionality FSAGCOM, FIDSC and FGKD, respectively. Then, we construct a UC secure identity-based signcryption protocol πIDSC. Moreover, we shows that the identity-based signcryption πIDSC securely realizes the ideal functionality FIDSC if and only if the corresponding protocol ID-SC is secure. Finally, based on the identity-based protocol, we propose a group communica-tion scheme πSAGCOM, which can securely realizes the ideal functionality FSAGCOM in the (FIDSC,FGKD)-hybrid model.