Program execution device
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United States of America Patent
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May 15, 2012
Issued Date -
N/A
app pub date -
Feb 6, 2009
filing date -
Aug 26, 2003
priority date (Note) -
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Abstract
A program execution device capable of protecting a program against unauthorized analysis and alteration is provided. The program execution device includes an execution unit, a first protection unit, and a second protection unit. The execution unit executes a first program and a second program, and is connected with an external device that is capable of controlling the execution. The first protection unit disconnects the execution unit from the external device while the execution unit is executing the first program. The second protection unit protects the first program while the execution unit is executing the second program.
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