Definition
Passport is a Bitcoin-only hardware wallet made by Foundation Devices. It is designed to operate air-gapped: the device has no WiFi, Bluetooth, NFC, or USB data lines, and its USB-C port is wired for charging only. Transaction data moves between Passport and a companion application using QR codes, read through the device's built-in camera and displayed on its screen, or via a microSD card.
Open-source status
Foundation Devices publishes Passport's firmware under the GPL and its hardware design under the CERN Open Hardware License, which means the device meets common definitions of open-source software and open-source hardware and can be independently inspected. The hardware includes a Microchip secure element used to protect key material, alongside a dedicated noise source for entropy generation.
Companion app and compatibility
Passport pairs with Foundation's Envoy mobile application for setup, balance viewing, and transaction construction, and it also works with third-party Bitcoin wallets such as Sparrow, BlueWallet, Nunchuk, and Specter. It supports BIP-39 passphrases and multisig, exchanging PSBTs over its air-gapped QR and microSD channels.
See also air-gapped signing and cold storage.
In Simple Terms
Passport is a Bitcoin-only hardware wallet made by Foundation Devices. It is designed to operate air-gapped: the device has no WiFi, Bluetooth, NFC, or USB…