An information processing device including: a data processing unit that generates an encryption key of content; and a communication unit that transmits an encryption key generated by the data processing unit, wherein the data processing unit generates, as the encryption key, individual keys that are different for each new content recording processing on a recording medium in a content recording device, and transmits the individual keys through the communication unit.

An information processing apparatus includes a data processing unit which executes processing for decoding and reproducing encrypted content. The data processing unit executes processing for determining whether the content can be reproduced by applying an encrypted content signature file. The encrypted content signature file stores information on issue date of the encrypted content signature file and an encrypted content signature issuer certificate with a public key of an encrypted content signature issuer. In determining whether the content can be reproduced, the data processing unit compares expiration date of the encrypted content signature issuer certificate with the information on issue date of the encrypted content signature file, and does not perform processing for decoding and reproducing the encrypted content when the expiration date is before the issue date, and performs the processing for decoding and reproducing the encrypted content only when the expiration date is not before the issue date.

When the terminal device attempts to use a special content, which has an attribute including information distinguishing the special content from regular contents and which is stored in the recording medium device, the recording medium device refers to the revocation information indicating terminal devices restricted from using the special content. When the recording medium device determines the terminal device as a terminal device to be restricted from using the special content based on the terminal identifying information of the terminal device, the usage information output unit of the recording medium device does not transmit the necessary information for using the special content to the terminal device.