基于认证和加密技术的安全多媒体传输方案  

Secure multimedia transmission based on authentication and encryption technologies

作　　者：廉士国[1] 孙金生[1] 王执铨[1] 

机构地区：[1]南京理工大学自动化系,南京210094

出　　处：《东南大学学报（自然科学版）》2004年第B11期84-87,共4页Journal of Southeast University：Natural Science Edition

基　　金：高等学校博士学科点专项科研基金资助项目 (2 0 0 2 0 2 880 5 2 );江苏省自然科学基金资助项目 (BK2 0 0 413 2 ) .

摘　　要：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 .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.

关 键 词：图像加密 图像认证 图像传输 多媒体信息安全 密码学 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构] TP391.41[自动化与计算机技术—计算机科学与技术]