Identity-Based Identity-Concealed Authenticated Key Exchange

Identity-based authenticated key exchange (ID-AKE) allows two parties (whose identities are just their public keys) to agree on a shared session key over open channels. At ESORICS 2019, Tomida et al. proposed a highly efficient ID-AKE protocol, referred to as the TFNS19-protocol, under the motivation of providing authentication and secure communication for huge number of low-power IoT devices. The TFNS19-protocol currently stands for the most efficient ID-AKE based on bilinear pairings, where each user remarkably performs only a single pairing operation. But it does not consider users’ identity privacy, and the security is based on relatively non-standard assumptions.