Abstract

Optical Communication (OC) for data transmission was introduced more than 30 years ago. It employs two main technologies, fiber optics using a physical wire and Free Space Optical (FSO) wireless transmission. Fiber optics has been well developed over the years in terms of distance, bandwidth, speed, reliability, and other enhancements that contribute to its use. Recent developments in FSO transmission has made it the mainstream and a better alternative compared to RF wireless transmission, concerning all parameters. In this chapter, we focus on advancements in OC that represent innovative ideas of how to enable new methods of secured optical data transmission in different ways and not simply as an extension to current methods and technologies.

Highlights

  • The use of wireline and wireless communications is very common in a wide range of devices

  • The main reasons are wind misalignment, beam divergence due to propagation, weather tempering losses due to fog, smoke, and snow, atmospheric turbulence, and background noise due to artificial lights, and in Free Space Optical (FSO) the optical beam position may be missed due to misalignment between the transmitter and receiver structures. To mitigate these effects new modulation schemes have developed such as on–off keying (OOK), forward error correction (FEC), pulse width modulation (PWM), pulse position modulation (PPM), multiple PPM, digital pulse interval modulation (DPIM), binary phase-shift keying (BPSK), concatenated RS codes, short hops systems leading to performance improvements, turbo codes, low-density parity-check codes, and spatial diversity

  • Provided the entanglement measured exceeds a predefined threshold and their hardware is free of vulnerabilities, they can be sure that the security of the protocol

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Summary

Introduction

The same key is used for encrypting and decrypting the exchanged data. To avoid key discovery while transmitted, several protocols have been proposed, such as the Diffie-Hellman protocol and Asymmetric Cryptography such as RSA. The evolvement of Quantum Computing makes redundant any known cryptography. Using a reliable third-party able to generate certificates and encryption keys and simultaneously distributes it to the two parties who intend to exchange data. It is using alternate distributing channels different from the channel the two parties use for transferring the data. A secured key transition uses an optical communication platform

OC super-channel with high speed and high capacity
OC security threats and solutions
Selected technologies in implementing OC capabilities
OAM multiplexing for high capacity secured optical communications
Chaos-based high-speed and high bandwidth secure OC
Intensity modulation signals for physical layer security of optical communications
Optical wireless communication (OWC), the underlying technology for 5G and IoT
Unique implementations of OC under constraints
OC for short distance high-speed data transmission
Integrating OC and mobile devices used in the automotive and drone industry
Secured key-distribution using optical communication
Related work
Optical camera communications (OCC)
Experiment and results
Summary and conclusions
Full Text
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