中文摘要：

针对于有加密需求的监控领域,图像数据剧增对加密算法提出严峻考验。复杂的加解密算法将会增大运算开支,最终影响视频传输的实时性能。本文根据视频加解密要求,提出在视频监控领域进行光学加解密并设计了基于双随机相位编码的单通道加解密光学系统。该光学系统加解密速度和光速相等,加解密时耗几乎为零,在高清视频迅速普及的未来将会产生重要的应用价值,在军事加解密领域将有着广阔的应用前景。

英文摘要：

The increase of image data presents a serious challenge for the encryption algorithm in video surveillance.Complex encryption and decryption algorithm will increase the cost of calculation,which influences real-time performance of video transmission. In this paper,according to encryption and decryption requirements of the video,optical encryption and decryption is proposed in the field of video surveillance,and optical encryption and decryption system was designed based on double random phase encoding. The calculation speed of encryption and decryption is equal to the speed of light. Therefore,the spent time is almost equal to zero. The optical system will generate important value with the rapid popularity of high definition video and have broad application prospect in the domain of military encryption and decryption.