A check computers could never do before.

Passwords, one-time codes, push approvals and passkeys all prove you have something or know something. None of them proves where you are — that the two devices are in the same room when it matters.

At the moment it matters, one device sends a pulse into the space around it. It scatters off every wall and object and comes back scrambled — shaped by the exact geometry of that room at that exact instant. No two rooms scramble it the same way; no room does it the same way twice.

Both devices, being in the same place, catch the same scrambled pattern. That shared pattern is a signature unique to here and now — it did not exist a moment before, it will not exist a moment later, and it is never reused. The match is the proof; nothing secret is transmitted.

There is nothing to see here — no token, no code, no gadget doing something clever. Just trains of pulses colliding, rebounding and being absorbed in one room, for a fraction of a second.

Two devices held centimetres apart share that turbulence exactly. Anything further away — down the hall, across the world — cannot. The whole security of KeyPulse rests on that: a shared unpredictability that only devices standing together can experience. It feels about as intangible as physics gets — and that is the point.

The principle does not depend on a single signal type. Radio, Bluetooth, acoustic and optical are all in scope. The phone-and-wearable product is one way to use it.

Today that signature confirms two devices are together. Next, we want it to be the key itself.

The scramble a room produces is a deep well of natural entropy — the variability of the environment, the unpredictability of the physical world, all folded into one pattern. Our aim: let the devices in the room draw a shared secret straight from it, one nobody outside can predict or reconstruct. If that holds, the password stops existing — it is pulled from the room, only when you need it, only where you are. That is early research, and it is what we are raising to finish and have certified.

Wherever two devices must prove they are physically together — access and identity, a vehicle cabin, headless IoT pairing, industrial and critical-infrastructure settings — the same principle could apply. Those directions are exploratory; the phone-and-wearable Secure Chain is the one built end to end.