Built for Passport.
Passport Prime is Human Authority Hardware powered by KeyOS, Foundation’s Rust microkernel OS. It moves secure review and approval for high-stakes actions onto dedicated hardware, outside ordinary phones, laptops, browsers, and cloud accounts.
This is an early showcase of apps coming to Passport as we prepare the full SDK and app store.
The apps
Bitcoin
Liana Signer
A policy-aware Liana Miniscript signer that only ever signs a PSBT genuinely matching a registered descriptor.
Nunchuk Agent Signer
Passport Prime as a self-custodied, hardware-enforced spending-policy co-signer for an AI agent’s Nunchuk wallet.
Frostsnap Coordinator
Passport Prime as the offline Frostsnap coordinator: run the FROST key-generation ceremony air-gapped, pair a taproot wallet, and sign PSBTs, taking the role the Frostsnap phone app normally plays, on hardened hardware.
Nunchuk Inheritance
Turns Passport Prime into the offline plan-holder for a Nunchuk inheritance setup: your heir’s encrypted recovery guide, a dead-man’s-switch, and a claim kit, all on the device.
BIP-85
Derive independent wallets, keys, raw entropy, and passwords from Passport Prime’s master seed. No child can reveal its siblings or the parent, and restoring your one seed brings every child back identical.
Chain Notes
Personal notes written into real bitcoin transactions, composed and signed on a device with no network. A companion page broadcasts and rescans the chain.
Paper Wallet
Printable bitcoin gift bills generated offline, with keys from the device hardware RNG and seed-recoverable backup keys.
Build your own for Passport Prime
Every app here is a KeyOS application (Rust plus Slint) talking to a host over WebUSB, QuantumLink Bluetooth, WebSocket, or animated QR. The same release-with-approval primitive is open to third-party developers.