To easily specify a leakage origin when data are leaked even in the case of linking a plurality of information processors with each other and providing services.

The information processors 10a, 10b and 10c, etc., are configured by comprising an acquisition means 11 for acquiring processing object data, a conversion means 12 for converting the processing object data acquired by the acquisition means 11 to that in a processable form, and a signature means 15 for imparting electronic signature information relating to the acquisition destination of converted data to the converted data obtained by the conversion with the conversion in the conversion means 12 as a trigger.

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