FIDO compatibility is where security and user experience meet. FIDO is a collection of security specifications for powerful authentication. FIDO supports multifactor authentication and public-key cryptography. FIDO also supports UAF and U2F protocols to create a new key pair during registration with an online service and retains the private key. FIDO also stores personally-identifying information, such as biometric authentication data, on the user’s device for enhanced protection. The YubiKey 5Ci, for example, is highly compatible with FIDO to support multifactor authentication and protect users against cybercriminals.