Strongly Secure One-Round Group Authenticated Key Exchange in the Standard Model

Provided by: International Association for Cryptologic Research
Topic: Security
Format: PDF
One-round Group Authenticated Key Exchange (GAKE) protocols typically provide implicit authentication and appealing bandwidth efficiency. As a special case of GAKE - the pairing-based one-round Tripartite Authenticated Key Exchange (3AKE), recently gains much attention of research community due to its strong security. Several pairing-based one-round 3AKE protocols have recently been proposed to achieve provable security in the g-eCK model. In contrast to earlier GAKE models, the g-eCK model particularly formulates the security properties regarding resilience to the leakage of various combinations of long-term key and ephemeral session state, and provision of weak perfect forward secrecy in a single model.

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