| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and system for ensuring royalty payment for data distributed through a communication network. SOLUTION: Data which is suitable for browsing and research and whose quality is partially degraded is offered without having to pay for royalty. Furthermore, to receive data of high quality version, a user is solicited for royalty. The data of partially degraded quality version is virtually recognizable when it is shown, printed, reproduced, executed or used for other purposes at a user's terminal, e.g. it can be generated by eliminating or encoding a part of data whose quality is not degraded. The high quality version can be supplied by transmitting a complete version or transmitting the remaining data like an eliminated part or a decryption key. |
