Name: Keycard Shell
SKU: 10840
Availability: InStock

Keycard Shell

€150.00

Modular, air-gapped hardware wallet for easy self-custody

The Keycard Shell is a fully open-source hardware wallet designed for air-gapped transaction signing using easy to use removable Keycards. It separates the signing device from key storage, allowing private keys to remain inside a certified secure element at all times.

This design supports long-term, sovereign self-custody without reliance on closed firmware, wireless connections, or vendor-controlled infrastructure.

You can easily create a new key and save it to a Keycard

Features

Air-gapped operation
Transactions are signed offline using QR codes. No USB data connection, Bluetooth, Wi-Fi, or NFC is required for signing.
Removable secure element
Private keys reside on individual Keycards. Each card can have its own PIN and seed, enabling separation of wallets, backups, or roles.
Open-source hardware and firmware
The device firmware, hardware design, and tooling are fully open source and auditable.
Replaceable battery
Powered by a standard BL-4C battery, allowing easy replacement and extended device lifespan.
On-device verification
Built-in screen and camera allow users to review transaction details before signing.
Duress PIN support
Optional secondary PIN can reveal a decoy wallet if entered under coercion.