基于认证和加密技术的安全多媒体传输方案

本文提出一种安全可靠的多媒体传输方案 ,将多媒体编码过程与认证过程相结合 ,信道编码过程与加密过程相结合 ,既实现了对多媒体敏感区域的认证功能 ,又实现了对整个数据流的加密保护 .其中 ,认证过程对敏感数据进行数字签名 ,并将此签名嵌入敏感区域 ,它可以检测出恶意篡改或传输错误 ;信道编码加密过程是将纠错编码与混沌流密码相结合 ,同时具有纠错功能和加密功能 .理论分析可见 ,认证和加密过程都与编码过程相结合 ,计算复杂度低 ,而且保持了信道编码的容错能力 .实验结果表明 ,此方案具有较高的安全性 ,适合多媒体数据的安全传输 .

Secure multimedia transmission based on authentication and encryption technologies

A secure multimedia transmission scheme is proposed, which combines compression process with authentication process, and also combines channel-encodi ng process with encryption process. This scheme can both authenticate the sensit ive regions and encrypt the whole data stream. The authentication process signs the sensitive data, and embeds the generated signature into the data themselves, which can detect malicious tamper or transmission errors. The channel-encoding and encryption process combines error-correction encoding with chaotic stream cipher, which achieves error-correction and data encryption at the same time. T h eoretical analyses show that the authentication and encryption processes both co mbine with multimedia encoding processes, which make the system time-efficient and keep the error-robustness unchanged. Experimental results show that this sc heme is secure in perception and suitable for secure multimedia transmission.