Control device, mobile communication system, and communication terminal

摘要

A control device, includes : a word storage means that stores a plurality of words; an obtaining means that obtains messages which are transmitted/received together with images between first and second communication terminals; a determination means that determines whether any of the plurality of words stored in the storage means is identical or similar to any of words included in the messages obtained by the obtaining means; and a control means that causes one or each of the first and second communication terminals to display either a camera image or a substitute image which is transmitted from the other of the first and second communication terminals, depending on a determination result of the determination means, the substitute image being substitutable for the camera image.