近年来,基于混沌映射和智能卡的认证密钥协商协议被相继提出.然而,防篡改读卡器使得这类协议的实现成本较高并且很难在实际中广泛应用.另外,基于混沌映射的数字签名方案需要很高的计算资源,这使得依赖签名方案的公钥发布存在安全问题.据此,本文基于扩展混沌映射提出一种新的无智能卡的认证密钥协商协议.新协议消除了公钥发布过程.安全和性能分析表明,新协议能抵抗各类攻击并且计算复杂度较低.因此,新协议更适合在实际环境中应用. In recent years, authentication key agreement protocol based on chaos mapping and smart card has been proposed one after another.However, tamper-resistant readers make the realization of such protocols costly and difficult to be widely used in practice.In addition, The signature scheme requires a lot of computational resources, which makes the public key signature relying on the signature scheme have security problems.Therefore, this paper proposes a new smart card authentication key agreement protocol based on extended chaotic mapping.The new protocol eliminates the public key Release process.Security and performance analysis show that the new protocol can resist all types of attacks and low computational complexity.Therefore, the new protocol is more suitable for practical application.