Arrangement for protecting a chip and checking its authenticity

Details Arrangement for protecting a chip and checking its authenticity Arrangement for protecting a chip and checking its authenticity

2006-02-14

2006-02-14

Tran, Mai-Huong (Department: 2818)

Active solid-state devices (e.g., transistors, solid-state diode

Responsive to non-electrical signal

C235S449000, C235S487000, C235S492000, C235S493000

Reexamination Certificate

active

06998688

ABSTRACT:
The semiconductor device has a security coating with embedded magnetic particles and magnetoresistive sensors. This renders possible a measurement of the impedance of security elements defined by magnetoresistive sensors and security coating. If initial values of the impedance are stored, actual values can be compared therewith to see if the device has not been electrically probed or modified. Such a comparison can be used to check the authenticity of the device.

REFERENCES:
patent: 6764005 (2004-07-01), Cooper
patent: 0 993 653 (2000-04-01), None

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