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Subject: search.filters.subject.Communication security

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    Novel optical cryptography using PANDA ring resonator for highly secured communication
    (2011-07-01)
    Putthacharoen, Rattipong
    ;
    Juleang, Pakorn
    ;
    Mitatha, Somsak
    ;
    Yupapin, Preecha P.
    We propose a novel method of an optical cryptography using the dark-bright soliton conversion control in a modified adddrop 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 adddrop filter outputs. The optical cryptography consists of an adddrop 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. © 2011 Society of Photo-Optical Instrumentation Engineers (SPIE).
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    Data security transmission via a noisy channel
    (2011-05-02)
    Mitsophonsiri, K.
    ;
    Punthawanunt, S.
    ;
    Mitatha, S.
    ;
    Yupapin, P. P.
    We propose a novel method that can be used to perform the data verification and encryption by using the microring resonators incorporating an add/drop filter, where the confidentiality and integrity of information in optical communication can be formed. In this paper, the encryption is formed by the chaotic noise sophisticates irreversible and unpredictable in the nonlinear microring resonator. The proposed system is used to generate the message authentication code for maintaining data integrity, where the noisy signals are created by the microring resonator and combined with the encoded information to protect the man-in-the-middle attacks (decipher). By using the extremely small processing device, the proposed design can be easily applied to secure any form of communication in wireless network, mobile communication network and military applications with low power consumption and very high-speed procedures.
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    A novel temporal dark-bright solitons conversion system via an add/drop filter for signal security use
    (2010-11-01)
    Siririth, W.
    ;
    Mitatha, S.
    ;
    Pingern, O.
    ;
    Yupapin, P. P.
    We propose a new design of a security scheme by using the nonlinear behaviors of temporal dark and bright solitons within a micro-ring resonator system for signal security application. When a dark soliton pulse is input into the proposed system, the chaotic signal is generated, where the required bright soliton pulse can be retrieved and detected by the add/drop filtering device. The chaotic wave form can be cancelled by using an add/drop device, which can be connected and used in the communication link. By using the appropriate ring parameters, simulation results obtained have shown that the soliton conversion can be performed. The ring radii used are within the ranges from 5 to 10 μms and A<inf>eff</inf>=0.100.50 μm<sup>2</sup>. In application, the chaotic signal is generated and formed by the dark soliton within a nonlinear micro-ring device. This can be seen by using the add/drop device, where the bright soliton is formed and detected, which is available to use in communication link. The different temporal soliton response time is seen, the response times of 169 and 84 ns are noted for temporal dark and bright solitons, respectively, which can also be used to form the security key. © 2009 Elsevier GmbH. All rights reserved.
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    Fast and slow light generation using chaotic signals in nonlinear microring resonators for communication security
    (2009-01-29)
    Pornsuwancharoen, Nithiroth
    ;
    Chalyasoonthorn, Sawatsakorn
    ;
    Yupapin, Preecha P.
    We propose a new system of signal security using nonlinear micro ring resonators for optical communication system. When a soliton pulse Is input into the system, the chaotic signal Is generated and multiplexed into the optical link. The chaotic waveform can be canceled using an add/drop device connected into the transmission link. Using the appropriate ring parameters, the original signal can be retrieved. An other application results from the fact that the fast and slow light behaviors can be presented, and can be seen using the add/drop multiplexers. In some cases, we can generate signal to obtain the two identical "signal" and "ghost" signals, which are observed in a different time frame. In this application, communication security can be performed when the required information is multiplexed and performs the link using the chaotic signal, fast and slow light, and signal and ghost signals, where the original signal can be retrieved by the known clients. © 2009 Society of Photo-Optical Instrumentation Engineers.