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摘要

A purpose of the invention is to a distributed communication system wherein data is transmitted certainly even if some trouble happens on one of communicating lines (1, 2, ... N) and to enhance a masking effect of information. In the case that data including A, B and C stored in a device at a place transmits to another device 20 located at the different place, communicating lines including at least three lines are connected and divided data portion AB, BC and CA is transmitted to the communicating lines, respectively.