The Research And Implement Of AACS Pro-tection Mechanism In Blu-Ray Player System

AS the development of Computer Science, technology advances, has brought about a serious problem, which is crack technology is further improved, the piracy of digital media content has become increasingly rampant, the traditional method of protection has no longer played the role of protection. With the next generation of high-definition digital video format standard setting, a more security protection mechanism to protect the copyright of digital content security is much-needed. Advanced Access Content System(AACS) is such a protection mechanism, which using high-strength encryption, more effective key management, forming a chain to protect the whole area of content from content providers, content of the recording and reproduction, optical disk production, content decryption and play.Based on cryptography, this paper deeply analysis and research the entire system of AACS. Do research, design and implementation on each technology the system used to pretect the content. The paper is composed of six parts. The first part presents a introduction to the current background and the whole AACS system. The second part analysis the detail of Advanced Encryption Standard(AES), then implement the encryption and decryption function based on AES algorithm. The third part analysis the detail of elliptic curve digital signature and then implement the digital signature function. The fourth part analysis the most important technology in AACS-the renewability of key management, which is based on SubSet-Difference method. The fifth part analysis the security of data transmission between deive and PC host, then propose a algorithm to achieve this purpose by verify the signature of drive certificate and host certificate. The last part is a summary of the paper and the expectation of the future work.