Information tracing system and information tracing method

摘要

When an information distribution section receives information sent from another information intervention apparatus, a distribution sensing section senses it and records a distribution history in a distribution history holding section. Each information intervention apparatus transmits distribution histories to a tracing center via a history sending section. In the tracing center, a distribution history collection section collects the distribution histories transmitted from the information intervention apparatuses, and stores those into a distribution history holding section. A tracing analysis section 23 analyzes an information distribution route etc. based on the distribution histories stored in the distribution history holding section 22. An analysis result display section 24 displays an analysis result.