Abstract: Considering the data security and integrity on the processing of HD video data stream transmission, acrypto DSP with special implementation for DES, SHA1, MD5, RSA are introduced. In order to improve the performance and decrease the cost, the DSP has 11 pipeline stages, and two parallel execution clusters (each cluster contains 3 function units). In order to improve throughput, special instructions are customized for complex operations. The methods of realizing the symmetrical encryption, public-key encryption and authentication algorithm based on such DSP are presented. In order to improve the throughput, The simulation experiment results show that the performance can well satisfy the requirement of real time HD video data stream applications.

Key words: Very Long Instruction Word (VLIW), parallel structure, Digital Signal Processing (DSP), Data Encryption Standard (DES), SHA1, MD5, RSA

摘要： 针对HD视频数据流传输过程中数据安全与完整性问题，介绍了一种专用于DES、3DES、SHA1、MD5、RSA的加密VLIW DSP(LILY-DSP)。 为了提高性能和降低成本，DSP设计成具有11级流水线和2个并行执行簇，每一簇具有3个功能单元的专用并行结构。为了提高速率，定制了专用指令实现复杂操作。提出了基于此DSP的对称加密算法、公钥加密和认证算法实现方法。仿真实现结果表明，基于VLIW DSP加密和认证算法能很好地满足实时HD video数据流需求。

关键词: 超长指令字, 并行结构, 数字信号处理, 数据加密标准, SHA1, MD5, RSA