Secure computer system having privileged and unprivileged memori

Details Secure computer system having privileged and unprivileged memori Secure computer system having privileged and unprivileged memori

1992-09-21

1993-08-17

Cangialosi, Salvatore

Cryptography

Key management

Having particular key generator

380 50, 395425, H04L 900, G06F 1214

Patent

active

052376168

ABSTRACT:
The microprocessor resides along with its protected real address space in a secure module surrounded by tamper resistant circuitry pad. Encryption programs and encryption keys are stored in the protected memory. A second real address space is also connected to the address and data bus of the microprocessor in order to provide program and data space for a user. Gating circuitry prevent the exposure of instructions and data form the privileged memory from appearing outside of the secure module. The gating circuits switch address spaces by recognizing a sequence of predetermined addresses.

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