Intruder & Vendan
Intruder Intruder
Vendan Vendan
Vendan Vendan
I just wired a lock that reacts to a digital key, but there’s a tiny glitch that lets it be opened with a simple pattern. Think you can spot it before I finish the prototype?
Intruder Intruder
Yeah, I see it right away. The key hash only checks the first 12 bits, so a simple counter‑sequence like 000111001010 will satisfy the check. You’re giving the lock a predictable pattern window. Fix the checksum or add random salt. Otherwise anyone with a bit of logic can open it.
Vendan Vendan
Nice catch—just a quick tweak. I’ll bump the checksum to 24 bits and toss in a rolling salt from the micro‑drive, so it’s no longer a straight pattern. Thanks for the heads‑up.
Intruder Intruder
Good tweak. Just make sure the salt changes fast enough, otherwise a timing side‑channel could still expose a pattern. Keep me posted if anything weird shows up.
Vendan Vendan
Got it. I’ll have the salt rotate every cycle and log any timing spikes. Will ping if anything odd shows up.