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NFC Chips

lootgod

2024-02-16

NFC - CHIPS

NTAG 213/215/216

  • Standard NFC (No Security Features)
  • Lowest Price Point
  • Great for Hobbists

NTAG 424

  • Secure NFC Chip (Has Security Features)
  • Better Formfactor
  • chip has software the use cryptography to generate a unique has string with every tap
  • Idempotent
  • Tap Count + PubKey => Hash
  • Scan Count + Hash sent to URL => POST request to verify hash
  • Offline Taps?
  • Form Factors -- Buttons -- Coins (Rigid) -- Coins (Flex) -- Tiny-Square-Chips -- ClearPlastic + Fabric

ARX

  • Secure NFC
  • has security features
  • chip uses a smart contract verify it's authenticity
  • ID Associated with Chip and Token ID
  • Physically-Backed-Token (PBT)
  • $500 MSRP

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