Information security – Access control or authentication – Authorization
Reexamination Certificate
2007-05-15
2007-05-15
Revak, Christopher (Department: 2131)
Information security
Access control or authentication
Authorization
C726S017000, C713S194000, C711S163000, C711S203000
Reexamination Certificate
active
10391618
ABSTRACT:
In an inner memory type tamper resistant microprocessor, a requested secret protection attribute requested for each access target memory page by a task is set and stored exclusively from other tasks, at a time of reading a program into memory pages and executing the program as the task, and a memory secret protection attribute is set and stored for each access target memory page by the task, at a time of executing the task. Then, an access to each access target memory page is refused when the requested secret protection attribute for each access target memory page and the memory secret protection attribute for each access target memory page do not coincide.
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Fujimoto Kensaku
Hashimoto Mikio
Shirakawa Kenji
Yamaguchi Kensaku
Kabushiki Kaisha Toshiba
Revak Christopher
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