Facet
An unclonable optical fingerprint for physical goods — a passive glitter mark whose random structure is the identity, verified with a phone. No electronics, no chip.
Cryptography signs bits, not atoms: a signed QR or NFC tag proves a valid signature, not that this is the real object. Facet closes that gap — a small passive glitter mark whose random 3-D structure is a fingerprint no one can reproduce, bound to the object and verified with a phone.
- A passive glitter mark goes on the product or its packaging — no chip, battery or reader; the random arrangement of flakes is its unclonable fingerprint.
- At production each mark is swept and its flake constellation is recovered by position — appearance-agnostic, so lighting, angle and holographic colour-flash don’t matter — then signed as a tamper-evident digital twin.
- Verification is a guided phone sweep matched against that twin, accumulating evidence like a face scan until it decides: genuine items matched decisively, and different objects saw zero false accepts in testing.
- Because the fingerprint is the object’s own physical randomness, it defeats transplant as well as cloning — the mark can’t be peeled off and moved onto a fake.
This is a laboratory direction, not a delivered product. We show it because the thinking is worth reading as it develops — not as client proof.
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