MICROPROCESSOR

Japanese Patent JP2003051819

A

To provide a microprocessor that can easily fit to multi-processing and a multi-user environment while maintaining tamper resistance and performance.

A random number generating section 104 generates a random number that cannot be deducted from the outside of the microprocessor 100 at application of power or in the case of resetting and generates a processor transient key Kc depending on the generated random number. A random number storage section 105 stores the processor transient key Kc. When an exception detection section 108 detects an exception state such as interruption and process switching, an arithmetic processing section 103 instructs an encryption processing section 109 to save a context such as values of each register in a register group 102. Accordingly the encryption processing section 109 encrypts the context by using the processor transient key Kc. An external memory 1 stores the encrypted context.

WO/2005/001666	DUAL VIRTUAL MACHINE AND TRUSTED PLATFORM MODULE ARCHITECTURE FOR NEXT GENERATION MEDIA PLAYERS
JP2003178163	LICENSE MANAGING SERVER, TERMINAL DEVICE, LICENSE MANAGING SYSTEM AND UTILIZATION LIMIT CONTROL METHOD
JPS6167161	SYSTEM FOR INHIBITING UNIVERSAL USE OF SOFTWARE

FUJIMOTO KENSAKU
SHIRAKAWA KENJI
HASHIMOTO MIKIO
TERAMOTO KEIICHI
OZAKI SATORU

JP2001241089A

February 21, 2003

August 08, 2001

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TOSHIBA CORP

G06F12/14; G06F9/06; G06F21/10; G06F21/12; G06F21/14; G06F21/60; G06F21/62; G06F21/75; H04L9/08; H04L9/10; (IPC1-7): H04L9/10; G06F12/14; H04L9/08

JPH10320191A	1998-12-04
JPH10187546A	1998-07-21
JPH08185361A	1996-07-16
JPS63152241A	1988-06-24
JP2001318787A	2001-11-16
JP2001230770A	2001-08-24
JP2002140236A	2002-05-17
JP2002232417A	2002-08-16

Hidekazu Miyoshi (7 outside)

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