Distributed Cross-Domain Anonymous Authentication Scheme in Internet of Things

In the process of Internet of Things cross-domain authentication, centralized security management is easy to bring single point failure problem, especially in the future intelligent Internet of Things based on wireless communication, this problem needs to be paid more attention and avoided. In order to improve the efficiency and scalability, this article proposes a distributed domain security center construction scheme. Using elliptic curve encryption algorithm and bilinear pairing technology, the protocol process of intradomain registration, intradomain access and cross-domain authentication based on distributed authentication center is designed; by introducing an out-of-domain signature discrimination factor, the cross-domain validation parameters are doped to avoid the impostor behavior of malicious neighborhood DCA (DCA, Distributed Certificate Authority) members; the scheme provides corresponding measures to realize authentication of both sides, confidentiality of sensitive information, anonymity of visitor identity and behavior. Compared with similar schemes, the proposed scheme has simple communication, strong anonymity, and solves the single point failure problem without increasing the computational overhead.