Group key management presents a fundamental challenge in secure dynamic group communications. In this paper, we propose an efficient group authenticated key agreement protocol (EGAKA), which is designed to be fully distributed and fault-tolerant, provides efficient dynamic group membership management, mutual authentication among group members and is secure against both passive and active attack...

Certificateless public key encryption is an advanced version of identity-based and public key encryption techniques. It eliminates the inherent key escrow and other key management issues in both techniques, e.g., it does not need any public key infrastructure or digital certificates. This paper presents a survey of the certificateless public key encryption schemes that have been proposed to imp...