Secure computer system having privileged and unprivileged memories
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 17, 1993
Grant Date -
N/A
app pub date -
Sep 21, 1992
filing date -
Sep 21, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
First Claim
Family
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully