Efficient certificateless authenticated key agreement method and system without bilinear pairing operation

Abstract

In order to enable the overhead of an authenticated key agreement process to tend to be the lowest on the basis of ensuring safety and reliability, the invention discloses a novel certificateless authenticated key agreement method without bilinear pairing operation. According to the method, mutual authenticated key agreement is realized by integrating a Schnorr signature with a public key basic difficulty problem; as long as an attacker cannot obtain a long-term user private key, a part of private keys and a temporary private key of a certain party at the same time and does not initiate counterfeit and forgery attacks after obtaining the long-term user private key and the part of private keys, a session key obtained by agreement through the method is safe; and reliable key agreement is realized by adding a key confirmation link. The invention also discloses a system based on the method. An ECC-based embodiment shows that the amount of calculation only has a scale of three scalar multiplications, each party needs to send two messages in an agreement stage (without key confirmation), but the total amount of the messages is equivalent to that of similar protocols, so that the invention provides the safe, reliable and efficient authenticated session key agreement method and system.

Description

technical field [0001] The invention belongs to the technical field of authentication key agreement in network security, in particular to a public key-based non-certificate authentication or self-authentication key agreement (or distribution, distribution, exchange) method, which can be used for inter-node security in distributed networks Efficiently negotiate shared session keys. Background technique [0002] With the continuous development and application of next-generation networks, security issues have become increasingly prominent. In order to realize the secure communication of open and interconnected computer networks, especially the secure communication of wireless networks, we need to use public key technology to securely construct a session symmetric key between two users, that is, we need to solve the authentication key agreement (AKA , AuthenticatedKeyAgreement) problem. Recently, there are mainly studies by Deng Lunzhi, Liu Yong, Tu Hang, Seung-Hyun Seo, Mutaz...

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Problems solved by technology

[0010] So far, forming a KCI attack

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