Design And Implementation On NVD Remote Decryption Key System For IBE

NVD is based on red high-definition, which is produced by independent domestic units of HD DVD players in cooperative R & D。Its playback is completely reached the international first-class level, but the cost in the production industry has a great advantage. One of the major problems in NVD industry is the source of the film. Enhance the safety of information in NVD disc and copyright protection technology has become the technical assurance of NVD industry taking more sources. Current information encryption of NVD disc, are still have some security risks, which should be solved.For ensuring this performance while solving the security risks, decryption key preserved in NVD disc, through rethinking the overall architecture of NVD, a idea is presented based on the identity of the remote key public key cryptosystem. In the network we set certification and Private-Key-Generator (PKG) which is third party as the basis of information of the remote key. When users play a disc, NVD machine send a request of decryption key to the authentication server. Authentication server is responsible for the identity of the user rights authentication, and collecting information about users and programs in disc. Certification server will send the information to the PKG when the request of decryption key is allowed by certification server. PKG is responsible for producing a decryption key of NVD disc based on program ID which is the identity information of NVD disc and sending the decryption key to the NVD user through secure channel which is based on public key cryptography.This design of the program involves both symmetric and asymmetric cryptographic techniques, as well as network socket technology in the communication process. Ensuring the rapid response of the user playing and reaching a certain level of security of the safety performance is the key to this program.The program not only eliminates the ciphertext that the decryption key of NVD disc exists in the NVD disc, but also provides authentication and communication models of high-definition online video service. It provides important reference value on remote video services of NVD.