Vault & Vellum
Grey Market
Territory control for NFC-secured goods
Grey-market diversion is product leaving the contracted territory. Each authentic tap of a Vault & Vellum NTAG 424 inlay reports an approximate location so brands can count, and act on, out-of-contract circulation.
Approximate geolocation
A genuine tap carries a coarse network location of the item — city or region, not a precise street pin. Taps that fall outside the licensed territory increment an out-of-contract counter for that product family.
Brands see volume and pattern, not a live tracker on the owner.
Uncloneable tap fingerprint
NXP NTAG 424 DNA uses Secure Dynamic Messaging — SUN — to mint a new AES-128 signed payload on every tap. The mirrored URL carries a one-time picc_data and cmac. A copied link fails the next read because the chip counter and signature never repeat.
Photographing the tag, cloning the static UID, or replaying an old SUN cannot impersonate a live chip.
Ideal 25 mm inlay — life-size
The 25 mm wet inlay is the ideal size for bottles, boxes, and certificates: large enough for a reliable phone read, small enough to sit flush under foil or label stock.
Peel self-destruct
The antenna is a destructible loop bonded to the product. If someone tries to peel the chip off to move it onto a counterfeit, the loop tears. The silicon may remain, but it can no longer complete a valid SUN tap.
A lifted tag is a dead tag — the grey-market copy loses the cryptographic voice of the original.