Casa, a leading provider of Bitcoin self-custody services, has announced an integration with YubiKeys, enabling users to secure their Bitcoin vaults with Yubikeys. 

YubiKeys are small physical devices that provide multi-factor authentication and securely store sensitive data like passwords and keys. By integrating support for YubiKeys, Casa members can now use the devices as one of the keys in their multi-signature Bitcoin vaults.

When setting up a YubiKey with Casa, users generate a Bitcoin seed phrase locally on their computer. This seed is then stored on the YubiKey itself, protected by a passkey. 

The integration uses passkey cryptography to ensure the seed phrase never leaves the…

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