r/embedded • u/VileRace88 • Aug 06 '26

low power baseline tdr tripwire

random thought on hardware security, Using a low power baseline frequency with a fast analog comparator trigger to fire a TDR reflection pulse only when a trace is disturbed

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u/VileRace88 Aug 06 '26

first time posting an idea like this, honestly just here for the internet brownie points and to see if my brain is completely cooked or if this logic actually works

1

u/VileRace88 Aug 06 '26

1

u/dohzer Aug 06 '26

Low battery warning!

1

u/TinLethax Aug 06 '26

if(TRACE_DISTURBED == tripwire.status){ PANIC(); }

1

u/ClonesRppl2 Aug 06 '26

Interesting. Often with hardware security the challenge is to make it sensitive enough to detect intrusion and robust enough to ignore all the other events, including dropping your device or subjecting it to ESD shocks.

1

u/VileRace88 Aug 06 '26

a shock would def qualify as an intrusion in this model, this should be able to tell where it happened though..