DATA DISTRIBUTION DEVICE, DATA PROVISION DEVICE, DATA DISTRIBUTION METHOD, DATA PROVISION METHOD, DATA DISTRIBUTION PROGRAM, DATA PROVISION PROGRAM AND INFORMATION RECORDING MEDIUM WITH THOSE PROGRAMS RECORDED

摘要

PROBLEM TO BE SOLVED: To provide a data distribution device or a data provision device for easily managing key information, and for improving the protection of a copyright and the operability of a user.

SOLUTION: An information recording/reproducing device 400 decodes content data provided by a data circulation system 100 based on license key information recorded in a removable HD 10, and generates content key information based on the license key information for the decoded content data, and performs predetermined encryption processing based on the generated content key information. In the case of decoding the encrypted content data, the license key information recorded in the removable HD 10 is deleted from the removable HD 10.

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