Electrical computers and digital processing systems: support – Data processing protection using cryptography – Tamper resistant
Reexamination Certificate
2004-06-14
2010-06-22
Truong, Thanhnga B (Department: 2438)
Electrical computers and digital processing systems: support
Data processing protection using cryptography
Tamper resistant
C713S300000, C327S142000, C327S143000, C327S198000
Reexamination Certificate
active
07743262
ABSTRACT:
An integrated circuit including: non-volatile memory for containing secret information; and a detection unit for preventing at least one form of power supply attack on the secret information, the detection unit comprising:a first comparator having a first input connected to a first reference voltage and a second input connected to a power supply line, the first comparator being configured to output a first detection signal when a power supply voltage moves beyond a first predetermined limit determined by the first reference voltage; andan output to provide a signal to delete, overwrite, or otherwise render unreadable at least the secret information in the memory when the first detection signal is output by the first comparator.
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Silverbrook Research Pty Ltd
Truong Thanhnga B
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