A secure processor is operable in normal and preferred modes, and includes a security kernel instantiated when the processor enters into preferred mode and a security key accessible by the security kernel during preferred mode. The security kernel employs the accessed security key to authenticate a secure...http://www.google.de/patents/US8065521?utm_source=gb-gplus-sharePatent US8065521 - Secure processor architecture for use with a digital rights management (DRM) system on a computing device
