Positive response communication manner and positive response communication method

摘要

PURPOSE: To reduce the amount of calculation required for discriminating whether or not a party returning an acknowledge is a correct recipient by converting repetitively a communication text reaches from a destination sender by means of a unidirectional function offering one-to-one conversion at a fast processing speed. ;CONSTITUTION: A transmitter-receiver A100 sends secret information to a transmitter-receiver B200 as an electronic document. Upon the receipt of the document from the transmitter-receiver A100, the transmitter-receiver B200 returns an acknowledgement to the transmitter-receiver A100. The communication system is made up of a commit stage to send the secret information and a disclosure stage to disclose the secret information. Then whether or not the presence of inversion of the secret information with respect to any conversion is verified by using the conversion using the unidirectional function offering one-to-one conversion, and illegal data disclosure of the transmitter-receiver is detected by using the property that sole inversion is attained when the inversion is in existence. Since no complicated element is used, high speed processing is realized as the amount of calculation gets smaller.;COPYRIGHT: (C)1996,JPO