Card-based crypto hardware wallet

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What is B.CHAIN?

B.CHAIN is IDEMIA’s solution for mass deployment of crypto hardware wallets in a biometric card form factor. It reinforces the security of non-custodial mobile wallets handling cryptocurrencies, NFTs and Web3 access.

B.CHAIN securely stores private keys in the card chip and signs transactions under the control of the user. The solution is based on IDEMIA’s biometric card technology offering authentication with a fingerprint sensor embedded in the card body or with a PIN code.

B.CHAIN is easy to integrate with existing mobile wallet apps and interacts through the phone’s NFC interface. The B.CHAIN SDK is available on iOS and Android.

Business applications

  • Sign transactionWallet App connects the card to sign a blockchain transaction
  • Manage crypto coin in the walletWallet App offers the option to the user to add coin in his wallet, related public key is retrieved from the card to be able to receive payment and check balance.
  • Fingerprint enrollmentEnrollment of 2 user’s fingerprints on B.CHAIN card with a sleeve at home
  • (BIP32) creation on cardWallet App enables the user to create a HD wallet on the card (BIP39 / BIP32)
  • Wipe the cardWallet App offers the option to wipe the card (delete all data on the card)


B.CHAIN is a user-friendly and secure way to hold crypto assets and sign blockchain transactions.

  • Mobile-friendly: first hardware wallet designed for mobile
  • Easy to use: just tap the biometric card to transact
  • Certified chip: secure cold storage
  • Fingerprint locked: theftproof with on-card biometrics
  • Portable: no charge required and easy to carry
  • Web3-enabled: access to the decentralized web
  • Cost effective: suitable for mass deployment


As the leader in identity technologies, IDEMIA is on a mission to unlock the world and make it safer. Backed by cutting edge R&D, IDEMIA provides unique technologies underpinned by longstanding expertise in biometrics, cryptography, data analytics, systems, and smart devices. Every day around the world, IDEMIA is trusted by over 1,900 Financial Institutions and FinTechs to secure billions of interactions in the physical and digital worlds.

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