COMMUNICATION DEVICE, COMMUNICATING SYSTEM, AND PROGRAM

PROBLEM TO BE SOLVED: To provide a communication device, communication system, and program capable of preventing others from easily acquiring data in comparison to a case when the data is transmitted in the same communication environment, and capable of improving a security level. SOLUTION: A communication system 1 includes: a power line 43 capable of performing power line communication; and a data communication line 45 for performing Ethernet (R). An image forming device 2A and an information processor 3A are connected to the power line 43 and the data communication line 45, and also includes a power line communication function. Thus, the image forming device 2A and the information processor 3A can perform data transmission by using either the power line communication or the Ethernet (R) communication or using both of them. COPYRIGHT: (C)2010,JPO&INPIT