Content browsing restriction system, content browsing limiting method and content browsing restriction program, as well as removable media reader

摘要

A system includes a content playback apparatus 10, a removable media reading apparatus 20 that is provided with a nonvolatile memory 22m in which first viewing restriction information is stored, and that is detachably attached to the content playback apparatus 10, and a removable media 30 in which second viewing restriction information is stored, and the removable media 30 being detachably attached to the removable media reading apparatus 20, and the content playback apparatus 10 checks the first viewing restriction information against the second viewing restriction information, and if the first viewing restriction information satisfies a condition of the second viewing restriction information, removes a playback restriction on a content stored in the removable media 30 in a state of being restricted for playback. It is possible to restrict viewers of the content to specific target persons, and also it is possible to reduce the risk of tampering of the viewing restriction information, and increase security in content management.