Device, user, or server registration and verification

A device comprising:

• a memory;
• processing circuitry, including a transducer to generate biometric data of a user of the device, coupled to the memory, the processing circuitry being configured to:
• register the device with an authentication server at least in part by receiving or generating a device identification;
• register the authentication server with the device at least in part by receiving or generating an authentication server identification and storing the authentication server identification in the memory;
• register a user with the authentication server including receiving or generating a user identification including the biometric data;
• in response to a determination that the user has performed a specified action using the device, verifying, via communication between the device and the authentication server, at least two identities of (i) the device identification, (ii) the authentication server identification, (iii) the respective user identification, and (iv) that the respective user identification is associated with the device identification;
• in response to any of the at least two identities failing failing verification, deny user action to functionality of the device;
• and
• in response to all of the at least two identities being verified, permit the user access to the functionality of the device.