Smartcard Hat for SeedSigner
€ 25.99
- USD: 30.12$
When it comes to managing your crypto securely, flexibility and compatibility matter. The SmartCard HAT brings hardware-backed authentication to your Raspberry Pi in a compact, easy-to-integrate form. Whether you’re working with full-sized cards, SIM-sized cards, or both, this HAT delivers reliable performance with CCID/PCSC compatibility.
Built around the SEC1210UR2/SEC1210URT serial interface, the HAT communicates over UART through the standard Raspberry Pi GPIO header. Power is provided via the onboard USB-C socket, keeping your setup simple and streamlined.
Choose from three models to fit your needs: a full-sized card version, a SIM-sized card version, or a dual-slot option (with only one slot active at a time). This makes it a versatile solution for developers and enthusiasts experimenting with different card formats.
The HAT integrates seamlessly with SeedSigner through a custom fork, enabling Satochip functionality directly from your Pi. It’s fully compatible with both retail SeedKeeper cards and self-flashed applets on supported Javacards, giving you complete control over your backup and authentication strategy.
Each SmartCard HAT ships ready to use—just connect it to your Raspberry Pi, flash your applets, and start working with secure smart card operations in minutes.
Technical Specifications
- Interface: CCID/PCSC over UART (Raspberry Pi GPIO header)
- Chipset: SEC1210UR2 / SEC1210URT
- Power: USB-C socket
- Versions available: Full-sized card / SIM-sized card / Dual-slot (single active slot)
- Compatibility: SeedSigner (fork with Satochip support), SeedKeeper cards, Javacards with supported applets
The SmartCard HAT is a compact, hardware-backed authentication add-on for Raspberry Pi, designed for secure crypto management.
It supports CCID/PCSC communication over UART and is powered via USB-C.
Available in full-sized, SIM-sized, or dual-slot versions, it works with SeedSigner (Satochip fork), SeedKeeper cards, and compatible Javacards. Easy to integrate, it enables secure smart card operations in minutes.
This add-on device enables the secure import and export of seed phrases using smart cards protected by a PIN code, adding an extra layer of security.
Seed phrases can be encrypted and stored directly on the smart card, ensuring that the readable seed phrase is never exposed.
In essence, it enhances the overall security of key management by keeping sensitive data protected throughout the process.
This device was designed with open-source principles in mind. Users can build it themselves using the documentation available on GitHub: https://github.com/3rdIteration/seedsigner . By using smart cards secured with PIN protection, it adds an extra layer of security to key management.
No, it does not eliminate the need for a physical backup!
Having one is still essential for redundancy. This device, when used with smart cards, simply provides a secure and convenient way to import and export your keys. It allows you to keep your physical backups safely stored away while using the smart card to load your keys into SeedSigner for signing transactions and interacting with your wallet.
We offer the smartcard hat in full credit card size, simcard size dual slot (only one slot can be used at the same time)