| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an information processor with an encryption device, which can improve protection of the copyright to the received data and can deal with the life of a recording medium suitably. SOLUTION: This processor is provided with a copyright protection identification part 4 to identify whether the received data is the data protected by the copyright or not and a reliability decision part 8 to decide the reliability of a recording medium 2. A encryption key is formed in the encryption key formation part 6 based on the prescribed information of the recording medium 2 in the case the reliability of the recording medium 2 is high in the reliability decision part 8 when the data identified that it is protected by the copyright in the copyright protection identification part 4 is enciphered. On the other hand, when it is determined that the reliability of the recording medium 2 is low, the encryption key is formed based on the prescribed information of the information processor 1.</p> |
