Research on Cross-Domain Communication Authentication Based on Certificate-less Cryptography

This paper deeply explores the problem of cross-domain communication authentication based on certificateless cryptographic system, aiming to overcome the difficulties faced by traditional cryptographic system, such as complicated certificate management and key escrow risk. The dynamic key negotiation and hierarchical verification algorithm (DKNHV) is innovatively proposed, which organically combines the high security of elliptic curve cryptographic system with the convenience of certificateless cryptographic system. The experiment relies on NS-3 network simulator to build a multi-domain network environment and simulate various cross-domain communication scenarios. Compared with the traditional certificate-based authentication scheme, the DKNHV algorithm has significant results: the authentication delay is reduced by about 30%, which greatly shortens the time interval from request issuance to successful authentication, meeting the application scenarios with high real-time requirements; the communication overhead is reduced by about 25%, effectively reducing the network transmission burden and improving resource utilization; the key negotiation success rate is increased by 15%, enhancing the stability and reliability of the communication connection. The algorithm uses a unique dynamic key negotiation mechanism to flexibly adjust the key generation strategy according to the network status. At the same time, the hierarchical verification mechanism from local domain to cross-domain joint verification ensures the security and efficiency of the authentication process in all aspects, laying a solid foundation for cross-domain communication security.