Keystone Wallet is a fully air-gapped hardware wallet that communicates via QR codes. It currently supports over 1,000 cryptocurrencies, including BTC, ETH, USDT, BCH, XRP, TRON, LTC, Dash, Polkadot, and Kusama.
Keystone features a 4-inch touchscreen, open-source firmware, and support for PSBT multi-signature transactions. It aims to provide users with an easy-to-use cold storage solution. By pairing the cold device (hardware wallet) with a hot device (smartphone), Keystone enhances asset security while simplifying operations, significantly improving the overall user experience.
QR Code Data Transfer – I Sign, Therefore I Own
Most hardware wallets require some form of online interaction when signing transactions. For any hardware wallet, its degree of isolation is critical—it depends on how well it reduces attack surfaces when communicating with connected devices. Compared to USB, NFC, or Bluetooth, QR codes offer a much smaller attack surface and are currently the most secure method of data transfer for hardware wallets.
Keystone pioneered a solution to transfer large volumes of transaction data via QR codes. To ensure compatibility with desktop wallets like Electrum and Wasabi, it also features a TF card interface.
By transferring data via QR codes, you can verify every piece of information entering or leaving the wallet, ensuring no malicious code is injected and that sensitive information like private keys never leaves the device. Unlike USB or Bluetooth, QR codes are fully verifiable since any standard QR scanner can decode and display their contents.
EAL 5+ Secure Element with Open-Source Firmware
Keystone utilizes a banking-grade secure element (SE) to perform operations such as generating true random numbers, deriving keys, and signing transactions. This ensures that your private keys are never exposed, even in the event of a physical attack.
Keystone is the first hardware wallet to open-source the firmware for its secure element, allowing users to verify all cryptographic operations, such as key derivation and signing, performed within the SE. You can also build the firmware yourself from the source code on GitHub and verify the authenticity of firmware updates. The hardware circuit design has also been open-sourced for full transparency.
Removable Battery Design to Prevent Corrosion
Batteries are often the most fragile part of an electronic device. Keystone features a removable battery design to prevent corrosion and extend battery life. Both the Standard and Pro versions support AAA battery power, so users don’t need to worry about battery failure. The Pro version also includes both a rechargeable lithium battery and a AAA battery compartment.
Note: AAA batteries can have unstable voltage and are generally used in low-demand devices like remote controls. Therefore, the Keystone Standard version powered by AAA batteries is ideal for long-term holders who use the wallet infrequently.
Fingerprint Authorization for Transactions (Pro Version Only)
Experienced users often own multiple hardware wallets for different purposes. The Keystone Pro includes fingerprint recognition, allowing users to securely authorize transactions in public spaces like coffee shops or airports, helping prevent password leaks due to shoulder surfing. The fingerprint feature can be used to unlock the device, access hidden wallets, and sign transactions. It can also be disabled anytime in the system settings.
