Search International and National Patent Collections

1. (WO2017150417) COMMUNICATION DEVICE AND COMMUNICATION METHOD

Pub. No.:    WO/2017/150417    International Application No.:    PCT/JP2017/007368
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Tue Feb 28 00:59:59 CET 2017
IPC: H04B 10/85
H04B 10/075
H04L 29/14
Applicants: NEC CORPORATION
日本電気株式会社
Inventors: NAKADA Tatsuhiro
中田 樹宏
Title: COMMUNICATION DEVICE AND COMMUNICATION METHOD
Abstract:
[Problem] To obtain a communication device with which it is possible to more effectively prevent leakage of information when an interception device or the like is connected. [Solution] This communication device is configured to be provided with a communication means 1, a monitoring means 2, a control means 3, and an authentication means 4. The communication means 1 transmits and receives optical signals to and from a corresponding device via a transmission line. The monitoring means 2 monitors the transmission state of the transmitted optical signals. The control means 3 transmits a signal based on a dummy pattern instead of the actual data when the monitoring means 2 has detected that a blockage has occurred in the transmission of the optical signal. When transmission of the signal based on the dummy pattern is being performed, the authentication means 4 authenticates the start of transmission of a signal based on the actual data when the monitoring means 2 has detected that the blockage has been removed. The control means 3 transmits the signal based on the actual data instead of the dummy pattern when the start of transmission has been authenticated by the authentication means 4.