Tracing system having follow-up distribution section for distributing information based on a distribution history of prior distributed information stored in distribution history storing section

An information tracing method comprising the steps of:

• sensing a distribution of first information from a first information tracing system as a distribution source to a second information tracing system as a distribution destination;
• storing distribution information representing the distribution;
• and
• distributing second information different from the first information based on the stored distribution information representing the distribution, the second information receiving a distribution identical to the distribution of the first information.

An information tracing system comprising:

• distribution sensing means for sensing information distribution from a first information tracing system as an information distribution source to a second information tracing system as an information distribution destination;
• distribution history storing means for storing histories representing an information distribution sensed by said distribution sensing means, the histories including at least a destination identifier;
• and
• follow-up distribution means for distributing second information after first information based on a distribution history of the first information stored in said distribution history storing means, the second information receiving distribution at least in part identical to a distribution of the first information.