A method to authenticate a data processing apparatus having a recording device and apparatuses therefor

摘要

The method involves authenticating a recording device and a host via the host and the recording device, respectively. The recording of data to and/or reproducing of the data from the device is performed upon determining that the host and the device have authenticated each other until a data processing apparatus is turned off. One of a pair of keys is allocated to the host and the other key to the device. An independent claim is also included for a host-side authentication apparatus for authenticating a recording device of a data processing apparatus.