Privacy-Preserving Authentication and Key Agreement Protocols for D2D Group Communications

Device-to-Device (D2D) communications play a key role in the next generation mobile communication networks and wireless systems (5G) and the Internet of Things ecosystem. D2D group communications are significant for group based services. In spite of its benefits, new application scenarios and new system architecture expose the D2D group communications to unique security threats. Although there are numerous studies on security and privacy in two-user D2D communications, a lack of solutions on secure and privacy-preserving D2D group communications would restrict their wide usage. In this paper, we propose two privacy-preserving authentication and key Agreement protocols (PPAKA-HAMC and PPAKA-IBS) to guarantee secure and anonymous D2D group communications. In our protocols, a group of D2D users mutually authenticate with each other without leaking their identity information while negotiate a common D2D group session key for secure communications in a D2D session. Formal security analysis and comprehensive performance evaluation show security and effectivity of our protocols.