TIME INFORMATION GUARANTEE SYSTEM AND ITS METHOD

摘要

PROBLEM TO BE SOLVED: To provide a time information guarantee system, attaching display of objectively reliable product manufacturing/service providing time by a product manufacturer/service provider to a product/service without relying on a third party institution unconditionally.

SOLUTION: This time information guarantee system includes: a random number generator provided in a time tag broadcasting firm 1 for periodically generating a time tag as a random number; a transmit means for transmitting the time tag to a digital broadcasting firm 2; a digital broadcasting device provided on the digital broadcasting firm 2 to digitally broadcast the received time tag; and a time server provided on a time tag authentication firm 4 to receive the digitally broadcast time tag, and associating the time tag with the receive time of the time tag to be stored in a database.

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