面向协同系统的SRTP安全机制的研究

SRTP协议是目前应用广泛的视频流传输协议，也是视频会议协同系统进行安全实时传送的基础。但该协议在加密模式、完整性检测、报文身份验证和抵御重播攻击等方面仍有不足，该文采用增加流加密算法选择器对加密算法选择进行优化组合，通过Hash运算生成散列序列增加完整性保护模块等途径，在保证实时性的同时，增加了报文被解码的难度，改进了完整性校验过程。通过进行相关的系统安全性能评估，验证了该方案对协同系统安全机制改进的可行性及有效性。

Research of SRTP Security Mechanism of Cooperative System

Secure Real-time Transport Protocol （SRTP） is a widely used video streaming transport protocol today, it is also the basic of the cooperative system for video conference to do a safe and real-time transportation. However, there still exist some dis- advantages in SRTP, such as encryption mode, integrity detection, message authentication, replay attack prevention, etc. In this paper, a stream encipher algorithm selector is added to optimize the encryption algorithm, and a message integrity module is add- ed by executing a hash operation to generate the hash sequences, which increase the difficulty of decoding message and improve the integrity checking process while ensuring its real-time performance. System＇s security performance evaluation on the system proves the feasibility and validity of the proposed method.