| 摘要 |
PROBLEM TO BE SOLVED: To prevent illegal distribution, processing and copying of data downloaded from a server to a client in a system that serves a communication service to clients individually. SOLUTION: Illegal distribution of contents data can be prevented by integrating a client personal ID information KID(x) to contents data downloaded from a server to a client. Furthermore, illegal processing/copying of the contents data can be prevented by integrating the client personal ID information KID(x) to the contents data according to a method by which the identifier cannot be lost even when the contents data are processed/copied. |
