System Design of DRM Applied in the Digital Media Distribution

The paper proposes a design of a DRM system,which adopts part of the AACS(advanced access content system)[1] standards,takes off-line as its major environment and shares a high demand for security mode.It gives an overall design and analysis of this specific DRM system,and then is devoted to explaining with details the design and implementa-tion of the subsystems,the choice of algorithm,content authentication,encryption and decryption,and IC card.