Contents processing method, contents processing system, recording device, execution device, central device, and computer memory product

摘要

The present invention is a system capable of protecting copyright and personal information appropriately and allowing users to readily obtain desired contents in a short time at low prices. A recording device stores contents in advance. The recording device encrypts the contents, based on an identifier given uniquely to a medium. The recording device records the encrypted contents on the medium. Moreover, the recording device records limiting conditions for reproducing, displaying or executing the contents on the medium. An execution device decrypts the contents recorded on the medium, based on the identifier. The execution device reproduces, displays or executes the contents under the limiting conditions recorded on the medium.