Secure CPU and memory management unit with cryptographic...

Details Secure CPU and memory management unit with cryptographic... Secure CPU and memory management unit with cryptographic...

2006-09-12

2006-09-12

Smithers, Matthew (Department: 2137)

Electrical computers and digital processing systems: support

Data processing protection using cryptography

Computer instruction/address encryption

C380S277000

Reexamination Certificate

active

07107459

ABSTRACT:
Methods and systems for accessing information in and loading encrypted information to memory. A processor provides virtual address information to a memory management unit. In response, the memory management unit retrieves a key tag and physical address information corresponding to the virtual address information. The memory management unit then sends the key tag and physical address information to the processor. The processor then determines whether a memory location corresponding to the physical address information is encrypted based on the key tag, and retrieves a secret key using the key tag based on the determining. Thereafter, information read from the memory location is decrypted using the secret key.

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patent: 0 583 140 (1994-02-01), None
patent: 02/25410 (2002-03-01), None
U.K. Search Report.

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