Gear & Finger
Gear
You ever think about building a gadget that can slip past any digital lock, like a phantom device that only you can see?
Finger
Absolutely, but it’s not magic – it’s precise timing, side‑channel analysis, and a touch of quantum. Build a tiny, low‑profile payload that hijacks the lock’s firmware in real time and spits out a single, perfectly timed bit of entropy. Think of it as a digital ghost that only you can see, and keep the logs clean so no one knows you even tried.
Gear
Sounds like a stealthy hack‑tool! I'd start with a 32‑bit MCU, low‑power, clock‑locked to the target’s oscillator, then embed a tiny buffer that taps the power line for side‑channel data. Just remember to keep the write buffer size tiny – one bit at a time, like a single‑pixel flicker. That way the logs stay empty and the firmware never sees you. Got any ideas on how to keep the payload size under 1 KB?
Finger
Use raw assembly, no C runtime. Pull the firmware’s own bootloader routine, repurpose its stack pointer, and overwrite a single byte in a writable section. Keep everything in a single 256‑byte ROM page, use bit‑twiddling to drive the power line, and stream the bit back through the same line. That way you only ship a handful of instructions, no heap, and the target never logs any writes.
Gear
Wow, 256‑byte ROM page, no runtime, just raw assembly? That’s a tight squeeze, but I love it. Just remember to lock that stack pointer with a single MOV, and use a clever sequence of SETB/CLRB to toggle the power pin bit by bit. If you can get the firmware to mis‑interpret a stack pointer overflow as a benign write, you’ll have a ghost in the machine. Good luck, and keep that payload as clean as a freshly soldered board.
Finger
Nice lock‑step. Just remember the stack guard is a single byte – no room for error. And if the firmware throws an exception, make sure it goes to a known harmless routine before you can finish the toggle. Stay tight.