Optical Cryptography

Preecha Yupapin

Published May 7, 2013• 0 citations

Abstract

The proposed system consists of three optical devices, which are a PANDA ring resonator, an add/drop filter, and a Mach-Zehnder interferometer as shown in Figs. 2.1-2.3. The transmitter part of an optical cryptography system consists of a PANDA ring resonator, two add/drop filters, and a Mach-Zehnder interferometer. The receiver part consists of two add/drop filters and a Mach-Zehnder interferometer. An add/drop filter and the double microring resonators, together known as a PANDA ring resonator, are shown in Fig. 2.1. To perform the dark-bright soliton conversion, the dark and bright solitons are input into the add/drop optical filter. The input optical field (Ein) and the control port optical field (Econ) of the bright-dark soliton pulses are given by Eqs. 2.1 and 2.2 [15].

DOI: 10.1201/b17233-4

Related papers

Novel optical cryptography using PANDA ring resonator for highly secured communication

Rattipong Putthacharoen, Pakorn Juleang, Somsak Mitatha +1 more

We propose a novel method of an optical cryptography using the dark-bright soliton conversion control in a modified add/drop optical filter. By using the control arrangement, the obtained outputs of the dynamic states of dark-bright soliton can be used to form the key suppression for communication security application, in which the key recovery can be obtained by controlling the add/drop filter outputs. The optical cryptography consists of an add/drop filter which is used to generate the encryption and decryption keys from the optical keys (LIP signals). A Mach-Zehnder interferometer is used for multiplexing and de-multiplexing operations. Simulation results obtained shows, that the proposed system can be used to form a high security communication system.

Optical EngineeringJul 1, 20115 citations

Novel optical cryptography using LIP signals generated by a PANDA ring resonator

P. Pongsanam, Pakorn Juleang, Somsak Mitatha +1 more

Abstract We propose a novel optical cryptography using the dark‐bright soliton conversion control in a modified add/drop (AD) optical filter. By using the control arrangement, the obtained outputs of the dynamic states of dark‐bright soliton can be used to form the key suppression which can be available for communication security application, where finally, the key recovery can be obtained by controlling the AD filter outputs. The optical cryptography part consists of an AD filter which is used to generate the encrypted and decryption keys from the optical keys (LIP signals), and a Mach–Zehnder interferometer is also used for multiplexing and de‐multiplexing operations. The simulation results obtained have shown that the proposed system can be achieved, which can be used to form high security communication. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:2575–2580, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26324

Microwave and Optical Technology LettersAug 19, 20112 citations

Photon Switching using Nonlinear PANDA Ring Resonetor

Sa-nga Songmuang, Suphanchai Punthawanunt, Somsak Mitatha +1 more

We propose a new system of an all optical switching system using an optical add/drop filter consisting of two nano ring resonators. The dynamic behavior of dark-bright soliton collision within the modified add/drop optical filter device, which it is known as PANDA ring resonator. By using the dark-bright soliton conversion control within the PANDA ring, the obtained output signals can be attenuated and used to perform the single photon switching, which is capable for security code application. Results obtained have shown that the random binary codes based on a single photon switching can be formed by using the polarized light components, dark and bright solitons, whereas the single photon switching codes can be obtained by using the attenuated dark-bright soliton conversion signals output signals.

Procedia EngineeringJan 1, 20115 citations

Cryptography using dark-bright soliton to generate keys by orthogonal dark-bright soliton pair

Xaythavy Louangvilay, Somsak Mitatha, 正廣吉田 +4 more

A method of optical cryptography by using soliton as dark-bright conversion control within a modified add/drop optical filter is proposed.In principle, the coincidence (orthogonal) dark-bright soliton pair has shown promising behaviors, especially when they propagate into the π2 phase shifter, i.e. beamsplitter, π2 phase shift between bright and dark solitons is occurred and separated.Such behaviors can be used to form the orthogonal light modes (solitons), which can be useful for application of cryptography, where in this case the long distance cryptography can be easily managed.In this work we have derived and presented a concept of multi-orthogonal solitons generated by using dark-bright soliton pulses within the modified add/drop optical filter, which is known as a PANDA ring resonator.A pair of optical keys is randomly generated and transmitted into the transmission line, where finally the corrected keys between Alice (sender) and Bob (receiver) can be retrieved.By using the dark-bright soliton conversion control, the obtained output of the dynamic states can be used to randomly form the multi-orthogonal soliton pairs, which can be available for computer and communication security applications, especially for long distance link.

Jan 1, 20130 citations

Multi optical Soliton generated by PANDA ring resonator for secure network communication

Iraj Sadegh Amiri, M. Ranjbar, Ali Nikoukar +3 more

In this study, new system of quantum cryptography for network communication is proposed. Multi optical Soliton can be generated and propagate via a nonlinear modified add/drop interferometer system incorporated with a time division multiple access (TDMA) system wherein the transportation of quantum codes is performed. To increase the channel capacity and security of the signals, the PANDA ring resonator is proposed. Chaotic output signals from the PANDA ring resonator are input into the add/drop filter system. Chaotic signals can be filtered by using the add/drop filter system in which multi dark and bright solitons can be obtained and used to generate entangled quantum codes for internet security. In this study soliton pulses with FWHM and FSR of 325 pm and 880 nm are generated, respectively, where the Gaussian pulse with a centre wavelength of 1.55 μm and power of 600 mW is input into the system.

International Conference on Computer and Communication EngineeringJul 1, 201225 citations

Novel soliton cryptography using optical key generated by orthogonal dark-bright soliton pair

Xaythavy Louangvilay, Somsak Mitatha, Masahiro Yoshida +2 more

A new method of optical cryptography using dark-bright soliton conversion control within a modified add/drop optical filter is proposed. A pair of optical keys is randomly generated and transmitted into the transmission line, where finally the corrected keys between Alice (sender) and Bob (receiver) can be retrieved. In principle, the coincidence (orthogonal) dark-bright soliton pair has shown promising behaviors, especially when they propagate into the π/2 phase shifter, i.e. beamsplitter, the shift in phase of π/2 between dark and bright solitons is occurred and separated. Such behaviors can be used to form the orthogonal light modes (solitons), which are useful for cryptographic application, where in this case the long-distance cryptography can be easily managed. We have derived and presented a new concept of multi-orthogonal solitons generated by using dark-bright soliton pulses within the modified add/drop optical filter, which is known as a PANDA ring resonator. By using the dark-bright soliton conversion control, the obtained output of the dynamic states can be used to randomly form the multi-orthogonal soliton pairs, which can be available for computer and communication security applications, especially for long-distance link.

Optical EngineeringSep 3, 20121 citation