Optical Data Transmission Security System
Original Publication Date: 1984-Mar-01
Included in the Prior Art Database: 2005-Feb-03
Security of high data rate data transmission is maintained and monitored through the use of a fiber-optic link and a unique signal-interrupt detection system. As indicated in the drawing, data is transmitted from a first data processing system 10 to a second data processing system 11 by means of an optical transmitter 12, an optical fiber transmission link 13, and an optical receiver 14. This link 13 is an optical fiber cable. Since such cables do not radiate as do wire cables, security cannot be breached by tapping the fiber cable 13 without breaking the fiber or bending it abnormally. In either case, the signal level is interrupted or greatly reduced and such interruption or reduction is detected by a signal interrupt detector 15 to activate an alarm 16.