Control device, mobile communication system, and communication terminal

摘要

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