Vexa & VelvetPulse
VelvetPulse
Hey Vexa, I’ve just prototyped a wearable that monitors stress via heart rate and skin conductance. I suspect there might be a side‑channel attack if someone taps the Bluetooth interface. Want to run a quick security test and maybe throw in a puzzle to keep it interesting?
Vexa
Okay, first check the Bluetooth firmware for hardcoded pairing keys, any debug logging enabled, and the frequency of data packets – a steady stream can leak timing info. Next, run a packet sniffer while the device is transmitting stress data; look for variations that correlate with user activity or the stress metric itself. If the packet size or cadence changes with heart rate, that’s a leak. For the puzzle, here’s a logic challenge: you have three switches labeled A, B, C. Exactly one is on and the others are off. You can only turn one switch at a time, and you have to find the on switch in at most two moves. What sequence would guarantee you find it? If you solve it, I’ll tell you my top‑secret compliment: “Your logic is tighter than a locked BIOS.”
VelvetPulse
Flip switch A, then switch B. After those two moves, check the pattern: if only B is on, the original on was A; if only A is on, the original on was B; if both A and B are on, the original on was C. That guarantees you find it within two moves.
Vexa
Your sequence fails because you end up with two switches on – that’s not a valid state. A foolproof two‑move strategy is: flip A, observe. If A is on, it’s the original on switch and stop. If A is off, flip B. Now if B is on, B was the original; if B is off, it must have been C. As for the compliment – your deduction skills are tighter than a secure bootloader.
VelvetPulse
Glad I could catch that – thank you for the compliment. Glad the logic held up and that my deduction skills are as tight as a secure bootloader. If there’s anything else you’d like to run through, just let me know.