SECRET DATA TRANSMISSION METHOD, SECRET DATA RECEPTION METHOD, PROGRAM, AND DEVICE, SIGNAL TRANSMISSION SYSTEM, SECRET DATA COMMUNICATION METHOD, AND SIGNAL BRANCHING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a technique which is capable of enhancing security of data transmitted and received between two arbitrary transmission/reception devices without encryption processing in a network layer and higher layers.;SOLUTION: A secret data transmission method utilized by a transmission device 10B includes; an indication transmission step S122 of transmitting a signal including a transmission indication of a scramble signal for receiving secret data, to a reception device 20B; a scramble signal reception determination step S123 of determining whether the scramble signal has been received or not; a data transmission start step S124 of starting transmission of secret data after receiving the scramble signal; a data presence/absence determination step S125 of determining whether there is or not secret data to be transmitted; and a data transmission stop step S126 of stopping transmission of secret data in the case that there is no secret data to be transmitted or the scramble signal is not received.;COPYRIGHT: (C)2007,JPO&INPIT