Patent ID: 7536727
Filing Date: 2009-05-19
Classification: G11B

Abstract:
1. A recording apparatus including a driver and an encoder, comprising: an encrypting section which performs the following: encrypting the third key using the fourth key; and a processing section which performs the following when recording the contents onto the first recording medium: wherein the processing section performs the following when moving the contents from the first recording medium to a second recording medium: wherein when the contents are moved from the second recording medium to a third recording medium, the processing section performs the following: decoding the new move key using the new second key and the new third key, thereby obtaining the first key; generating a renewed first key; decoding the new encrypted contents using the new first key to obtain the contents, and encrypting the contents using the renewed first key, thereby obtaining renewed contents; processing the key specific to the encoder, using renewed medium key block information read from the third recording medium, and processing the processed key using renewed specific information read from the third recording medium, thereby obtaining a renewed second key; multiply-encrypting the renewed first key using the renewed second key and the renewed third key, thereby producing a renewed move key; processing the key specific to the driver, using the renewed medium key block information, thereby producing a renewed fourth key; recording, onto the third recording medium, renewed encrypted contents and the renewed move key; recording, onto a security area on the third recording medium, the renewed third key encrypted using the renewed fourth key; and erasing the new move key from the second recording medium.