Patent ID: 8332640
Filing Date: 2012-12-11
Classification: G06F,G11B

Abstract:
1. A storage apparatus which is able to communicate with an external apparatus, comprising: a storing area for storing encrypted content having content which is encrypted; a storing area for storing a key for decrypting the encrypted content; a storing area for storing as 1 bit information state information of a correspondence key corresponding 1:1 to a recording address of a usage pass of each of the encrypted contents having the key for decrypting the encrypted content and content usage condition and indicating whether or not the usage pass of each of the encrypted contents is valid; means for receiving authentication information from a first external apparatus which reproduces content; means for executing authentication processing based on the authentication information received from the first external apparatus; means for receiving location information of the key for decrypting the encrypted content from the first external apparatus; means for receiving a command for changing state information of the key for decrypting the encrypted content from the first external apparatus; means for executing the command for changing state information of the key for decrypting the encrypted content received under a certain condition; means for recording a history that the command is executed in a storing area installed therein; means for receiving a command for outputting the history to a corresponding external apparatus from the first external apparatus or a second external apparatus; and means for executing the command for outputting the history when the command for outputting the history is received from the first or second external apparatus.