News Researchers reveal chips that commit 'circuit suicide' — self-destruction and counterfeit protection in one

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The CCFB (Crash, Catch Fire, and Burn) undocumented instruction that all 1970's CPUs contained. Actually used in one custom tester where a self-distruct was desired under a specific condition.
Those were very fun times!
 
I thought it was specific to the 6809 chip, called "HALT and CATCH FIRE" (HCF). It wouldn't kill it, it would just be the last thing it did before infinitely looping (internally) under a power-cycle

 
As part of several anti-hacking measures introduced at ISSCC this year, a University of Vermont team created a self-destructing fingerprinting mechanism for different circuits.

Researchers reveal chips that commit 'circuit suicide' — self-destruction and counterfeit protection in one : Read more
For general purpose processors, not just a TPU or network credential that lies close to the cipher, these aren't peace loving people. Send 'em to take the shards out of the fields...
 
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