Electronic money, electronic use right, charging system, information processing apparatus, and reproducing method and reproduction control method of contents data

摘要

A reproducing method, electronic money, or an electronic use right of contents data, whereby when compressed and/or encrypted contents data is reproduced, a security for electronic money or an electronic use right is checked, if the electronic money or the electronic use right is invalid as a result of the security check, the reproduction of the contents data is stopped, and if the electronic money or the electronic use right is valid as a result of the security check, the contents data is reproduced and the electronic money or the electronic use right is consumed.