密钥管理系统在数字电影播放中的实现

Implementation of Security Management System in Digital Cinema System

高级内容访问系统(AACS)是蓝光光盘和HDDVD采用的安全标准。该文通过剖析AACS,提出使用软件解密的多处漏洞,给出以AES算法为核心的密钥管理系统(SMS)。该解密系统采用硬件实时解密,已经在数字电影服务器中使用,可以有效避免软件解密的多种问题。密钥管理系统还采取了额外的措施保护固化的密钥。

Blu-ray disc and HD DVD use Advanced Access Content System（AACS） to protect the media content. This paper analyzes the AACS, and finds the software decryption has many problems. It proposes Security Management System（SMS） which uses the Advanced Encryption Standard（AES） algorithm for decryption and encryption. It is implemented by hardware. It can avoid many problems which implement in software. The SMS takes some special measures to protect the AES keys which are deposited in the device.