PROBLEM TO BE SOLVED: To prevent a situation to cause a problem by using an unjustified product without a customer's notice even under such a situation that the product is delivered to the customer only under the circumstance that a delivery route is not credible.;SOLUTION: A product justification verifying system to verify the presence or the absence of a tamper or a substitution of the product has a system management means 21 to obtain a peculiar information related to a constitutional element of the product of a justification verifying object, an electronic signature generating means 6 to generate the electric signature on the basis of the peculiar information provided from the system management means 21 according to a requirement, and a verification means 3 to verify the presence or the absence of the tamper or the substitution of the product by comparing the peculiar information restored from the electric signature with the peculiar information provided from the system management means according to the requirement.;COPYRIGHT: (C)2005,JPO&NCIPI
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