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As multimedia technology and network technology continues to evolve , high-definition digital multimedia has been widely used, including video on demand , pay TV and video conferencing. In the country's strong support, Wuhan National Laboratory for Optoelectronics developed with independent intellectual property rights red HD player NVD (Next-Generation Disc), to fight abroad for high-definition Blu-ray technology market monopoly . Compared with the Blu-ray , NVD has considerable playback, but low cost, without having to pay high patent fees advantages , it has great market prospects . NVD develop without efficient sources for content protection technology . In -depth analysis of the current disc encryption algorithm and encryption algorithm based on the video , we propose a network-based video transmission encryption mechanism . In this mechanism , the original video file to extract a certain number of video data as the file's sensitive data , sensitive data are usually stored on the content server side. Meanwhile , the remaining video data encryption algorithm the usual , and the resulting ciphertext is burned to NVD disc , and the decryption key are stored on the content server side . For authorization during playback , then through the network and decrypt sensitive data will be transmitted to the NVD key player , NVD CD player decrypts the data , and with sensitive data integration in order to obtain the desired playback. For non- authorized during playback , even if the data on the disc is cracked , due to lack of sensitive data , NVD player can not get a good playback. Based on the above encryption mechanism , designed and implemented disc playback system authorization . The system can complete the user management and authentication , sensitive information transmission , video files, encryption and other functions, and can be flexibly adjusted sensitive data extraction methods . By test and analysis that the system under the premise of the bandwidth occupied by a small amount , you can get customer satisfaction encryption effect .
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