Hierarchical trusted code for content protection in computers

Details Hierarchical trusted code for content protection in computers Hierarchical trusted code for content protection in computers

2006-01-10

2006-01-10

Revak, Christopher (Department: 2131)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Protection at a particular protocol layer

C713S175000, C713S176000, C713S193000, C705S051000, C711S154000

Reexamination Certificate

active

06986059

ABSTRACT:
An architecture for protecting premium content in a nonsecure computer environment executes only a small number of code modules in a secure memory. The modules are arranged in a hierarchy of trust, where a module names other modules that it is willing to trust, and those modules in turn name other modules that they are willing to trust. A secure loader loads a security manager that oversees a number of content-providing modules for manipulating the content. A memory manager assigns permissions to various pages of the secure memory. The memory has rings of different security. The security model can be extended to program modules and other devices on the computer's bus, such as DMA controllers and peripherals.

REFERENCES:
patent: 5335334 (1994-08-01), Takahashi et al.
patent: 5491827 (1996-02-01), Holtey
patent: 5557518 (1996-09-01), Rosen
patent: 5671280 (1997-09-01), Rosen
patent: 5745886 (1998-04-01), Rosen
patent: 5841869 (1998-11-01), Merkling et al.
patent: 5872847 (1999-02-01), Boyle et al.
patent: 5892904 (1999-04-01), Atkinson et al.
patent: 5963980 (1999-10-01), Coulier et al.
patent: 5991399 (1999-11-01), Graunke et al.
patent: 6105137 (2000-08-01), Graunke et al.
patent: 6185683 (2001-02-01), Ginter et al.
patent: 6192473 (2001-02-01), Ryan, Jr. et al.
patent: 6212636 (2001-04-01), Boyle et al.
patent: 6229894 (2001-05-01), Van Oorschot et al.
patent: 6327652 (2001-12-01), England et al.
patent: 6330588 (2001-12-01), Freeman
patent: 6338139 (2002-01-01), Ando et al.
patent: 6363486 (2002-03-01), Knapton, III
patent: 6367012 (2002-04-01), Atkinson et al.
patent: 6389537 (2002-05-01), Davis et al.
patent: 6477252 (2002-11-01), Faber et al.
patent: 6480961 (2002-11-01), Rajasekharan et al.
patent: 6609199 (2003-08-01), DeTreville
patent: 6651171 (2003-11-01), England et al.
patent: 2002/0007452 (2002-01-01), Traw et al.
patent: 2002/0069365 (2002-06-01), Howard et al.
patent: 2002/0107803 (2002-08-01), Lisanke et al.
patent: 2002/0120936 (2002-08-01), Del Beccaro et al.
patent: 2002/0152173 (2002-10-01), Rudd
patent: 2004/0015694 (2004-01-01), DeTreville
patent: 2 260 629 (1993-04-01), None
“Phoenix Technologies Partners with Secure Computing in Enterprise Security Marketplace”, Jul. 12, 2001, Business Wire, couresty of dialog text search, p. 1-12.

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