Method and apparatus for maintaining secure and nonsecure...

Details Method and apparatus for maintaining secure and nonsecure... Method and apparatus for maintaining secure and nonsecure...

2006-05-30

2006-05-30

Morse, Gregory (Department: 2134)

Electrical computers and digital processing systems: support

Data processing protection using cryptography

By stored data protection

C380S216000, C382S276000, C713S166000, C726S027000

Reexamination Certificate

active

07055038

ABSTRACT:
A graphics processor receives a compressed encrypted video stream. The graphics processor decrypts the compressed encrypted video stream and stores a decrypted version (i.e., a decrypted compressed video stream) in a protected portion of an on-chip or off-chip video memory. The graphics processor then permits processors and other bus masters on the graphics processor to access the on-chip video memory, but conditionally limits access to other bus masters that are located off-chip, such as a central processing unit located off-chip and coupled to the graphics processor via a bus.

REFERENCES:
patent: 4787031 (1988-11-01), Karger et al.
patent: 5107443 (1992-04-01), Smith et al.
patent: 5825879 (1998-10-01), Davis
patent: 6148403 (2000-11-01), Haneda et al.
patent: WO 200225416 (2002-03-01), None

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