Information processing apparatus for accessing memory spaces including a user memory space and a secure memory space
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 21, 2009
Grant Date -
Sep 23, 2004
app pub date -
Jan 27, 2004
filing date -
Feb 4, 2003
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An information processing apparatus comprising a secure information unit that is set to the state not requiring security in the case where the data is transferred from a user memory space to a general purpose register, and that is set to the state requiring security in the case where the data is transferred from a secure memory space to the general purpose register. An encryption key in the secure memory space is prevented from being stolen by prohibiting the data transfer to the user memory space from the general purpose register with the value of the secure information unit set to the state requiring security.
First Claim
Family
International Classification(s)
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