Identity-based authentication key negotiation method based on lattice

Abstract

The invention provides a lattice-based identity-based authentication key negotiation method, which comprises the following steps of: registering and initializing information of communication entities of a client side and a server side to realize stable connection between the client side and the server side; a protocol initiator of TLS protocol handshake generates a temporary public and private key pair, generates a ciphertext according to a message, and sends the ciphertext and the temporary public key to a protocol responder by using Client Hello; after receiving the message, the protocol responder performs identity authentication and generates a ciphertext, and sends the ciphertext to the protocol initiator through Server Hello; after receiving the message, the protocol initiator carries out decryption and identity verification on the ciphertext, and if the identity verification is passed, the protocol initiator calculates a session key and carries out key export with the protocol responder; otherwise, the protocol initiator rejects the message and directly terminates key agreement. The security of the method is based on the lattice difficulty problem, quantum computing attacks can be resisted, and the method has more advantages in security and execution efficiency.

Description

technical field [0001] The invention relates to the technical field of communication security, in particular to a lattice-based identity-based authentication key negotiation method. Background technique [0002] At present, the vast majority of security protocols widely deployed in network information systems (such as the Internet and other public network infrastructures) are implemented using traditional public key cryptosystems such as Diffie-Hellman, RSA, and ECC. The security of these traditional public key cryptosystems The property is often built on the basis of classical number theory problems such as large integer decomposition problems and discrete logarithm problems. In recent years, the rapid development of quantum computing technology and its great potential in solving large-scale computing problems have brought unprecedented impact on the security of the above-mentioned traditional public key cryptosystems. Post-quantum security protocols are imperative. Trans...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the technical problem of poor security of the existing key agreement method, the present invention proposes a lattice-based identity-based authentication key agreement method, which is applicable to the handshake process of the latest version 1.3 Transport Layer Security (TLS) protocol Based on the identity authentication key agreement on the lattice, the security of the scheme depends on the intractability of the difficult problem on the lattice, which can resist quantum computing attacks

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