| 摘要 |
A leaked information tracing technique enabling a recipient of leaked information to be identified. A trace center apparatus includes a tracer generation and registration part which issues a tracer identification number uniquely identifying both of a content residing on different computer and a tracer, generates a tracer program having the function of reporting identification information of a computer on which the content resides and the tracer identification number to a trace center, and registers the tracer program with the trace center. |
