| 摘要 |
This invention provides a license information management apparatus and the like that do not require a tamper resistance module with a large memory even in the case where a user possesses a large amount of content. A total control unit ( 113 ) specifies a content corresponding to a reproduction instruction received from a user (S 202 ). Further, the total control unit ( 113 ) verifies whether or not there is a LT corresponding to the specified content in a secure flash unit ( 120 ). In the case where there is the LT in the secure flash unit ( 120 ) (S 203 : Yes) and information concerning the reproduction of the content is received from the content decryption unit ( 520 ) (S 204: Yes), an encryption/decryption unit ( 114 ) decrypts the LT stored in the secure flash unit ( 120 ) using a is TRM unique key (S 205 ). After that, the encryption/decryption unit ( 114 ) updates details of the content reproduction condition information ( 511 a), encrypts the updated details using the TRM unique key, and writes the encrypted TRM unique key into the secure flash unit ( 120 ) (S 208 ).
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