Proceedings of Topical Meeting on Optoinformatics (pdf-format, 1.21 ...
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Proceedings of Topical Meeting on Optoinformatics (pdf-format, 1.21 ...

Proceedings of Topical Meeting on Optoinformatics (pdf-format, 1.21 ... Proceedings of Topical Meeting on Optoinformatics (pdf-format, 1.21 ...

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4 OPTOINFORMATICS’05 CdF2:In: A FAST-RESPONSE MEDIUM OF THE REAL-TIME HOLOGRAPHY (Oral) 41 Alexander E. Angervaks, S. A. Dimakov, S. I. Kliment’ev, A. S. Shcheulin, A. I. Ryskin STRONGLY NONLINEAR REVERSIBLE HOLOGRAPHIC RECORDING AT THE 42 STRUCTURES Sb 2 S 3 – LC and As 40 Se 60 -LC (Oral) Larisa P. Amosova, A. N. Chaika, N. I. Pletneva ABOUT SIMILARITY OF THE VOLUME SUPERPOSED HOLOGRAMS TO THE HUMAN 44 MEMORY (Oral) Viacheslav V. Orlov DENTAL RESIN HOLOGRAMS (Poster) 46 Santa Toxqui-López, A. Olivares-Pérez, N. Grijalva y Ortiz, M. P. Hernández-Garay, B. Ruiz-Limón, I. Fuentes-Tapia MILK HOLOGRAMS (Poster) 48 I. Olvera-Bautista, S. Toxqui-López, A. Olivares-Pérez, M. Ortiz-Palacios, E. L. Ponce-Lee, M. P. Hernández-Garay, I. Fuentes-Tapia Session “Optical Devices, Optical Transformations, and Modeling” 50 LIGHT EMISSION BY THE NANOMETER-SCALE STRUCTURES (Oral) 50 Tamara A. Kudykina, A. I. Pervak IMPACT OF TILT OF A PHASE DOE ON THE PROPERTIES OF THE LASER BEAMS 52 MATCHED WITH THE ANGULAR HARMONICS BASIS (Oral) Anton A. Almazov, S. N. Khonina, V. V. Kotlyar MODELLING RIGOROUS DIFFRACTION FROM 3D SUB-WAVELENGTH 54 STRUCTURES (Oral) Janne M. Brok, H. P. Urbach LIDAR SIGNAL PROCESSING (Poster) 56 Georgeta-Jeni Ciuciu, D. N. Nicolae, C. Talianu, M. Ciobanu, V. Babin A Nd:YAG SURGICAL LASER FOR OPHTHALMOLOGIC STEREOMICROSCOPE 58 (Poster) D. Savastru, S. Miclos, C. Cotirlan, M. Mustata, E. Ristici, T. Brezeanu, S. Dontu, M. Rusu, V. Savu, A. Stefanescu ANALYSIS OF EDGE DETECTION ALGORITHM FOR ANALOG REALIZATION (Poster) 60 Evgeniya N. Serova PITTING CORROSION MONITORING WITH ELECTRONIC-SPECKLE 61 PHOTOGRAPHY (Poster) Lyudmila F. Frankevych Post-deadline papers 63 THE ANALYSIS OF RESOLUTION CAPABILITY OF THE OPTICAL COHERENT 63 TOMOGRAPH (Oral) Konstantin L. Khohlov, V. K. Sokolov GENERATION OF THE DISCRETE SPECTRAL SUPERCONTINUUM IN TWO 65 INTENSIVE ULTRASHORT PULSES INTERACTION (Poster) Michael A. Bakhtin, S. A. Kozlov THE PHYSICS AND ENGINEERING ASPECTS OF VIBRATION ISOLATION SYSTEM 67 DESIGNS FOCUSING THE APPLICATIONS FROM DIMENSIONAL TO QUANTUM METROLOGY SET UPS IN INDUSTRIAL ENVIRONMENT (Poster) S. N. Bagchi

SAINT-PETERSBURG, October 17 – 20, 2005 5 SOME ASPECTS OF SECURITY OF CHAOS-BASED COMMUNICATIONS V. S. Udaltsov a , A. Locquet a,b , L. Larger a , J. P. Goedgebuer a , and D. S. Citrin a,b a GTL-CNRS TELECOM, UMR FEMTO-ST 6174, Georgia Tech Lorraine, 2-3 rue Marconi, 57070 Metz, France b School ong>ofong> Electrical and Computer Engineering, Georgia Institute ong>ofong> Technology, Atlanta, Georgia 30332-0250, USA E-mail: udaltsov@georgiatech-metz.fr Chaotic dynamics ruled by delay-differential equations (DDE) and chaos-based communication systems are explored from the point ong>ofong> view ong>ofong> security. The problem ong>ofong> the identification ong>ofong> the time-delay is the main security aspect considered here. It is shown that carefully chosen architectures ong>ofong> the chaotic transmitter can increase the degree ong>ofong> security. The idea to use a chaotic carrier and synchronized chaotic waveforms for secure communications proposed originally in the beginning ong>ofong> the nineties was revised precisely in conjunction with security issues. Several papers dedicated to the security ong>ofong> chaotic cryptosystems have been published in the last years. In the very beginning, systems using low-dimensional chaotic carriers have been explored and broken successfully. Then, it was shown that even a high chaos complexity characterized by a large number ong>ofong> positive Lyapunov exponents, is not sufficient to ensure a high degree ong>ofong> security. This means that hyperchaotic cryptosystems can also be broken, as it was is shown in our paper [1] . We consider here optoelectronic cryptosystems ruled by delay-differential equations (a DDE in its simplest normalized form is known as Ikeda’s equation [2] ). They are ong>ofong> particular interest because they can produce highly complex chaos and, at the same time, are relatively easy to realize [3] . Message encoding is performed by a chaotic modulation technique [3] . Actually, the DDE-emitter represents a circuit with the feedback loop that includes a controlled source (for example, a tunable laser diode), a nonlinear element (for example, a birefringent plate placed between two polarizers or an interferometer), and a detecting photodiode that converts optical signals to electrical ones and also limits the bandwidth ong>ofong> chaotic oscillations. In numerical models such a limitation can be modeled by low- or band-pass filters [4] . If the topology ong>ofong> the system (the block-diagrams and the equations describing the dynamics ong>ofong> the system) is known to an eavesdropper (this assumption is usual for cryptanalysis), the reconstruction ong>ofong> the parameters ong>ofong> the system allows decoding ong>ofong> the transmitted information. The eavesdropper’s attack can be fulfilled with a real receiver that should be synchronized with the chaotic emitter [5] , or by numerical modeling ong>ofong> this receiver. In our previous article [1] , we have shown that the reconstruction ong>ofong> all the parameters characterizing a hyperchaotic system with a single feedback loop containing a strong nonlinearity is possible, when the value ong>ofong> the time delay T is known or recovered. When there is no way to identify the time delay, the chaos-based communication system becomes difficult to break using the cryptanalysis techniques published in the literature. In that sense, the main problem for an eavesdropper is to recover T. Thus, we have concentrated our attention on the problem ong>ofong> identifying the value ong>ofong> the time delay T.

4 OPTOINFORMATICS’05<br />

CdF2:In: A FAST-RESPONSE MEDIUM OF THE REAL-TIME HOLOGRAPHY (Oral) 41<br />

Alexander E. Angervaks, S. A. Dimakov, S. I. Kliment’ev, A. S. Shcheulin, A. I. Ryskin<br />

STRONGLY NONLINEAR REVERSIBLE HOLOGRAPHIC RECORDING AT THE 42<br />

STRUCTURES Sb 2 S 3 – LC and As 40 Se 60 -LC (Oral)<br />

Larisa P. Amosova, A. N. Chaika, N. I. Pletneva<br />

ABOUT SIMILARITY OF THE VOLUME SUPERPOSED HOLOGRAMS TO THE HUMAN 44<br />

MEMORY (Oral)<br />

Viacheslav V. Orlov<br />

DENTAL RESIN HOLOGRAMS (Poster)<br />

46<br />

Santa Toxqui-López, A. Olivares-Pérez, N. Grijalva y Ortiz, M. P. Hernández-Garay, B. Ruiz-Limón,<br />

I. Fuentes-Tapia<br />

MILK HOLOGRAMS (Poster)<br />

48<br />

I. Olvera-Bautista, S. Toxqui-López, A. Olivares-Pérez, M. Ortiz-Palacios, E. L. P<strong>on</strong>ce-Lee, M. P.<br />

Hernández-Garay, I. Fuentes-Tapia<br />

Sessi<strong>on</strong> “Optical Devices, Optical Trans<strong>format</strong>i<strong>on</strong>s, and Modeling” 50<br />

LIGHT EMISSION BY THE NANOMETER-SCALE STRUCTURES (Oral)<br />

50<br />

Tamara A. Kudykina, A. I. Pervak<br />

IMPACT OF TILT OF A PHASE DOE ON THE PROPERTIES OF THE LASER BEAMS 52<br />

MATCHED WITH THE ANGULAR HARMONICS BASIS (Oral)<br />

Ant<strong>on</strong> A. Almazov, S. N. Kh<strong>on</strong>ina, V. V. Kotlyar<br />

MODELLING RIGOROUS DIFFRACTION FROM 3D SUB-WAVELENGTH<br />

54<br />

STRUCTURES (Oral)<br />

Janne M. Brok, H. P. Urbach<br />

LIDAR SIGNAL PROCESSING (Poster)<br />

56<br />

Georgeta-Jeni Ciuciu, D. N. Nicolae, C. Talianu, M. Ciobanu, V. Babin<br />

A Nd:YAG SURGICAL LASER FOR OPHTHALMOLOGIC STEREOMICROSCOPE 58<br />

(Poster)<br />

D. Savastru, S. Miclos, C. Cotirlan, M. Mustata, E. Ristici, T. Brezeanu, S. D<strong>on</strong>tu, M. Rusu, V. Savu,<br />

A. Stefanescu<br />

ANALYSIS OF EDGE DETECTION ALGORITHM FOR ANALOG REALIZATION (Poster) 60<br />

Evgeniya N. Serova<br />

PITTING CORROSION MONITORING WITH ELECTRONIC-SPECKLE<br />

61<br />

PHOTOGRAPHY (Poster)<br />

Lyudmila F. Frankevych<br />

Post-deadline papers 63<br />

THE ANALYSIS OF RESOLUTION CAPABILITY OF THE OPTICAL COHERENT 63<br />

TOMOGRAPH (Oral)<br />

K<strong>on</strong>stantin L. Khohlov, V. K. Sokolov<br />

GENERATION OF THE DISCRETE SPECTRAL SUPERCONTINUUM IN TWO<br />

65<br />

INTENSIVE ULTRASHORT PULSES INTERACTION (Poster)<br />

Michael A. Bakhtin, S. A. Kozlov<br />

THE PHYSICS AND ENGINEERING ASPECTS OF VIBRATION ISOLATION SYSTEM 67<br />

DESIGNS FOCUSING THE APPLICATIONS FROM DIMENSIONAL TO QUANTUM<br />

METROLOGY SET UPS IN INDUSTRIAL ENVIRONMENT (Poster)<br />

S. N. Bagchi

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