| 摘要 |
PROBLEM TO BE SOLVED: To provide an information recording apparatus which is enhanced in security and improved in key storing structure in encryption of data to be stored in a storage means. SOLUTION: For example, in data storing structure for data storage means of a flush memory, etc., an encryption key applying for each sector is made the key being different each other. These encryption processing keys are stored in headers of the contents. Because the same key is used in the same sector even in the block of which key is different, the number of storage keys is limited, thereby restraining increase of storage key data. As for the key which is selected for each sector, one or more than two keys are selected depending on the applying encryption processing, for example, a single DES, a triple DES, etc., and sector data encryption and decoding processing are executed. |
