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Subject: search.filters.subject.communication security

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    Novel optical cryptography using LIP signals generated by a PANDA ring resonator
    (2011-11-01)
    Pongsanam, P.
    ;
    Juleang, P.
    ;
    Mitatha, S.
    ;
    Yupapin, P. P.
    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.
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    Public key suppression and recovery using a PANDA ring resonator for high security communication
    (2011-03-01)
    Juleang, Pakorn
    ;
    Phongsanam, Prapas
    ;
    Mitatha, Somsak
    ;
    Yupapin, Preecha P.
    An interesting security technique that uses the dark-bright soliton conversion control within the microring resonator is proposed. The obtained outputs for a dark-bright soliton dynamic state can be controlled and used to form the public key suppression for communication security application. However, a good design should be possible to be fabricated; therefore, by using the parameters based on the practical device parameters, the simulation results obtained have shown that the proposed system can indeed be achieved. The public key suppression and public key recovery can be used in a highly secure communication system and has potential applications in optical cryptography. © 2011 Society of Photo-Optical Instrumentation Engineers (SPIE).
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    Novel communication security scheme using dark-bright soliton conversion behaviors
    (2011-02-01)
    Pongwongtragull, Paiboon
    ;
    Teeka, Chat
    ;
    Kamoldilok, Surachart
    ;
    Yupapin, Preecha P.
    We propose a novel scheme of communication security using dark-bright soliton conversion behaviors in which the transmission signals can be secured by using the random codes generated by dark-bright soliton conversion within the system. The system consists of two parts, where first, an optical Mach Zhender interferometer (MZI) is used to generate the coincidence dark and bright soliton pair by using the (2) phase retarder (i.e., a coupler), in which |D and |B states represent the orthogonal dark and bright soliton pulses. The signals from through (Th) port are formed and transmitted via the transmission line to the end user. Second, the adddrop filter is used to separate(filter) the required signal form the transmission link, in which the Th and drop port signals are formed as a reference and signal, respectively. In this case, we assume that both solitons are input into the MZI ports simultaneously (coincidently), in which the binary codes are randomly formed and used to present the transmission data, in which the states 0 and 1 are represented by |DB and |BD, respectively. Finally, the eavesdropper and signal accuracy are also described. © 2011 Society of Photo-Optical Instrumentation Engineers (SPIE).
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    Dark-soliton multiplexing system for high-capacity and -security communication within a wavelength router
    (2010-05-01)
    Vongchumyen, Charoen
    ;
    Kulsirirat, Kathawut
    ;
    Mitatha, Somsak
    ;
    Yupapin, Preecha P.
    We propose a novel system for generating multiplexed dark-soliton pulses using multiple light sources via an optical multiplexer, whereby dark solitons with different center wavelengths can be generated. The multiplexed signals can be transmitted into the communication link and filtered by using an optical add-drop filter. By using suitable simulation parameters, we have shown that dark solitons with different center wavelengths can in fact be obtained. In application, the communication capacity can be increased by using the multiplexed dark solitons; moreover, the transmission signals can be secured by utilizing the behavior of dark solitons. A free spectrum range (FSR) 2.5 nm and an amplified power of 30 W of dark solitons with wavelength 1.60 μm can be achieved. Channel spacing of the communication signals within a wavelength router can be provided by using a suitable FSR, which can be managed by using crosstalk effect analysis. © 2010 Society of Photo-Optical Instrumentation.