Patent attributes
Disclosed herein is a data storage device with storage medium that stores encrypted user content data. A cryptography engine uses a cryptographic key to decrypt the encrypted user content data. An access controller receives, from a user device, a request to register the user device and generates a challenge for a manager device. The manager device is located remotely from the data storage device. The controller sends, to the user device, the challenge for the manager device; receives, from the user device, a response calculated by the manager device to approve the request to register; calculates the cryptographic key based at least partly on the response calculated by the manager device; and creates and stores authorization data associated with the user device. The authorisation data indicates the cryptographic key, to register the user device with the data storage device.
