Patent ID: 7142494

Claim:
A recording medium recording apparatus, comprising: a head portion configured to scan a recording medium having at least a lead-in area, a program area, and a lead-out area; an encrypting circuit configured to encrypt content data with key information; a signal processing circuit portion configured to perform a record signal process for output data of the encrypting circuit and supply the resultant processed signal to the head portion; a controlling portion configured to record the encrypted content data to the program area of the recording medium and record same key information including an encrypted content key and a medium key block to the program area, and at least one of the lead-in area and the lead-out; and a key encrypting circuit portion configured to receive further key information and to encrypt the key information with the further key information, the key encrypting circuit portion including, an arithmetic circuit portion configured to create the further key information with at least first key data and second key data which is unique to a recording and/or reproducing apparatus for the recording medium, and a multiplexing circuit portion configured to multiplex the first key data and the encrypted key information.