RECORDING DEVICE, RECORDING MEDIUM, AND CONTENT PROTECTION SYSTEM

摘要

There is provided such a recording/reproduction device that when a content subjected to image conversion is moved to another device and re-moved to the original recording/reproduction device from the moving destination, the content before the image conversion can be used. The recording/reproduction device includes: a first encrypted content generated by encrypting a content, a second encrypted content generated by subjecting the content to image conversion and encrypting it, storage means for storing a content key used for decryption of them, key moving means for recording the content key in an external recording medium and deleting the content key stored in the storage means, and content moving means used after the content key is deleted, for recording the second encrypted content in the recording medium and deleting it from the storage means. ® KIPO & WIPO 2007