Scalable and error resilient digital rights management (DRM) for scalable media

The displaying digital rights management machine and related method is divided into the multimedia contents the service quality layer, encryption at least multiple, and providing according to the grant to the encryption and access. Capable of made of different splitting method to receive hierarchical multimedia contents, and capable of providing to different type layer access. A layer of retain without encrypt, a licence free browsing of low quality of service rank. - Comprising claims a display key management system for digital rights management.