在物联网中的认证和密钥协商过程中，如果用户的身份信息以明文的形式传输，攻击者可能追踪用户的行动轨迹，从而造成信息泄漏。针对大多数基于身份的认证和密钥协商协议不能保护用户隐私的问题，提出一个基于身份的匿名认证和密钥协商协议。在设计的认证和密钥协商方案中，用户的身份信息以密文的形式传输，解决了用户的隐私问题。%In the process of authentication and key agreement in Internet of Things,if users'identity information is sent in plaintext form, the attackers may track users'action trajectory,which results in information disclosure.Most of the existing identity-based remote authentica-tions and key agreement schemes are not designed for protecting user's privacy.This paper presents an identity-based remote authentication and key agreement with anonymity.In the authentication and key agreement schemes designed,the problem of user's privacy protection is ad-dressed by sending user's identity information in ciphertext form.
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