标识密码技术在IMS网络中的应用

Application of Identity-based Cryptography in IMS Network

作为未来固网、移动统一的核心网络架构平台,IP多媒体子系统(IP Multimedia Subsystem,IMS)的安全性问题不容忽视。标识密码技术基于双线性对的标识密码算法,利用用户身份作为公钥,实现用户身份和公钥的天然绑定,构建相对简化、复杂度低的公钥密码体系,在数字签名、数据加密等方面具有天然的优势。通过对分布式标识密码机制进行研究,基于IMS网络设计私钥安全分发、终端入网认证、业务密钥协商等工作流程,有效解决IMS网络的安全防护问题,最后对方案的安全性进行了评估分析。

As the unified core network architecture platform of fixed network and mobile network in the future,the security of IMS(IP Multimedia Subsystem) can not be ignored.Identity-Based Cryptography uses the user identity as public key to bind user identity and public key,and constructs a relatively simplified and low complexity public key authentication system,which has natural advantages in digital signature,data encryption and so on.Through the exploration on the mechanism of hierarchical identity-based encryption,the processes of user private key security distribution,terminal access authentication,key exchange,etc.are designed to effectively address the IMS security problems.Finally,the security of the scheme is evaluated and analyzed.