Tamper-resistant computer system
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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N/A
Issued Date -
Aug 22, 2002
app pub date -
Nov 7, 2001
filing date -
Feb 22, 2001
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A system and method for realizing a tamper-resistant system which can prevent software running on a personal computer from being analyzed or altered illegally in a static or dynamic manner by a potential transgressor. Two operating systems, an OS1 controllable by a user and an OS2 operable in background, are concurrently run on a personal computer. Player software is run on the OS2 to protect the player software against illegal analysis and alteration by the user. Further, a hardware module, a system startup, and a key management operation are implemented. Still further, OS1 cannot direct access OS2, whereas indirect access of OS2 by OS1 is allowed in a manner whereby OS2 refers to an OS2 reference region in a memory area managed by OS1.
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