Indoor optical fiber eavesdropping approach and its avoidance
Haiqing Hao, Zhongwang Pang, Guan Wang, Bo Wang
Abstract
The optical fiber network has become a worldwide infrastructure. In addition to the basic functions in telecommunication, its sensing ability has attracted more and more attention. In this paper, we discuss the risk of household fiber being used for eavesdropping and demonstrate its performance in the lab. Using a 3-meter tail fiber in front of the household optical modem, voices of normal human speech can be eavesdropped by a laser interferometer and recovered 1.1 km away. The detection distance limit and system noise are analyzed quantitatively. We also give some practical ways to prevent eavesdropping through household fiber.
Topics & Concepts
EavesdroppingOptical fiberComputer scienceFiberOpticsNoise (video)TelecommunicationsFiber optic sensorComputer securityMaterials sciencePhysicsArtificial intelligenceComposite materialImage (mathematics)Blind Source Separation TechniquesSpeech and Audio ProcessingOptical Network Technologies