AES算法在PVR机顶盒中的应用研究

Application of AES Encryption Arithmetic in the PVR STB

PVR机顶盒是数字电视新的发展趋势,作为运营商收入的主要来源,数字电视节目流的加密保护也得到越来越多的认识和重视。对利用AES算法加密高清数字电视PVR机顶盒中所存储的高清电视节目内容,实现版权保护进行研究。重点介绍AES算法的具体实现步骤和优化,及其在PVR机顶盒上的应用,用C语言完成该算法并对其在嵌入式环境和普通PC机上的执行效率进行了比较。

Digital TV has entered into millions of households, PVR set - top - box with digital TV is a new development trend. As operators＇ main source of income, digital television encryption to protect TS flow has been more and more awareness and attention. Based on the principle of AES arithmetic, the encryption and decryption process are described, the application in the high- definition digital television programs stored by the content encryption is introduced, copyright protection to achieve the study focuses on the actualization and optimization of the AES algorithm and its PVR set - top - box in the application, Besides, the application using C language is accompolished, and the encryption and decryption speed of the arithmetic are compared.