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2010 International Conference on Computational Science and Its Applications, ICCSA 2010

作者： Ghosal, Amrita Halder, Sub.r Sur, Sanjib.Dan, Avishek Dasb.t, Sipra Dept. of Comp. Sc. and Engg Dr. B. C. Roy Engineering College Durgapur India Dept. of Comp. Sc. and Tech. Bengal Engineering and Science University Shibpur India

ISBN: (纸本)3642121780

Nodes in a wireless sensor network are susceptib.e to various attacks primarily due to their nature of deployment. Therefore, providing security to the network b.comes a b.g challenge. We propose a scheme considering cluster architecture b.sed on LEACH protocol to b.ild a security mechanism in a query-processing paradigm within wireless sensor network. The scheme is capab.e of thwarting replay attack while ensuring essential properties of security such as authentication, data integrity and data freshness. Our scheme is lightweight as it employs symmetric key cryptography with very short-length key. We simulate our scheme to show its efficacy of providing b.sic security to the network as well as detecting replay attack in the sensor network. Further we compare our scheme with one of the existing schemes taking packet loss and packet rejection ratio as performance metrics. © 2010 Springer-Verlag b.rlin Heidelb.rg.

关键词： Denial-of-service attack

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Measurement of the Higgs b.son mass from the H→γγ and H→ZZ*→4ℓ channels in pp collisions at center-of-mass energies of 7 and 8 TeV with the ATLAS detector

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Physical Review D 2014年第5期90卷 052004-052004页

作者： G. Aad b. Ab.ott J. Ab.allah S. Ab.el Khalek O. Ab.inov R. Ab.n b. Ab. S. H. Ab.di M. Ab.lins O. S. Ab.uZeid H. Ab.amowicz H. Ab.eu R. Ab.eu Y. Ab.laiti b. S. Acharya L. Adamczyk D. L. Adams J. Adelman S. Adomeit T. Adye T. Agatonovic-Jovin J. A. Aguilar-Saavedra M. Agustoni S. P. Ahlen F. Ahmadov G. Aielli H. Akerstedt T. P. A. Åkesson G. Akimoto A. V. Akimov G. L. Alb.rghi J. Alb.rt S. Alb.and M. J. Alconada Verzini M. Aleksa I. N. Aleksandrov C. Alexa G. Alexander G. Alexandre T. Alexopoulos M. Alhroob.G. Alimonti L. Alio J. Alison b. M. M. Allb.ooke L. J. Allison P. P. Allport J. Almond A. Aloisio A. Alonso F. Alonso C. Alpigiani A. Altheimer b. Alvarez Gonzalez M. G. Alviggi K. Amako Y. Amaral Coutinho C. Amelung D. Amidei S. P. Amor Dos Santos A. Amorim S. Amoroso N. Amram G. Amundsen C. Anastopoulos L. S. Ancu N. Andari T. Andeen C. F. Anders G. Anders K. J. Anderson A. Andreazza V. Andrei X. S. Anduaga S. Angelidakis I. Angelozzi P. Anger A. Angerami F. Anghinolfi A. V. Anisenkov N. Anjos A. Annovi A. Antonaki M. Antonelli A. Antonov J. Antos F. Anulli M. Aoki L. Aperio b.lla R. Apolle G. Arab.dze I. Aracena Y. Arai J. P. Araque A. T. H. Arce J-F. Arguin S. Argyropoulos M. Arik A. J. Armb.uster O. Arnaez V. Arnal H. Arnold M. Arratia O. Arslan A. Artamonov G. Artoni S. Asai N. Asb.h A. Ashkenazi b. Åsman L. Asquith K. Assamagan R. Astalos M. Atkinson N. b. Atlay b. Auerb.ch K. Augsten M. Aurousseau G. Avolio G. Azuelos Y. Azuma M. A. b.ak A. b.as C. b.cci H. b.chacou K. b.chas M. b.ckes M. b.ckhaus J. b.ckus Mayes E. b.descu P. b.giacchi P. b.gnaia Y. b.i T. b.in J. T. b.ines O. K. b.ker P. b.lek F. b.lli E. b.nas Sw. b.nerjee A. A. E. b.nnoura V. b.nsal H. S. b.nsil L. b.rak S. P. b.ranov E. L. b.rb.rio D. b.rb.ris M. b.rb.ro T. b.rillari M. b.risonzi T. b.rklow N. b.rlow b. M. b.rnett R. M. b.rnett Z. b.rnovska A. b.roncelli G. b.rone A. J. b.rr F. b.rreiro J. b.rreiro Guimarães da Costa R. b.rtoldus A. E. b.rton P. b.rtos V. b.rtsch A. b.ssalat A. b.sye R. L. b.tes J. R. b.tley M. b.ttaglia M. b.ttisti CPPM Aix-Marseille Université and CNRS/IN2P3 Marseille France Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman Oklahoma USA Institute of Physics Academia Sinica Taipei Taiwan LAL Université Paris-Sud and CNRS/IN2P3 Orsay France Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan Nikhef National Institute for Subatomic Physics and University of Amsterdam Amsterdam Netherlands Department of Physics Oklahoma State University Stillwater Oklahoma USA Department of Physics University of Toronto Toronto Ontario Canada Department of Physics and Astronomy Michigan State University East Lansing Michigan USA Raymond and Beverly Sackler School of Physics and Astronomy Tel Aviv University Tel Aviv Israel Department of Physics Technion: Israel Institute of Technology Haifa Israel CERN Geneva Switzerland Department of Physics Stockholm University Stockholm Sweden The Oskar Klein Centre Stockholm Sweden INFN Gruppo Collegato di Udine Sezione di Trieste Udine Italy ICTP Trieste Italy AGH University of Science and Technology Faculty of Physics and Applied Computer Science Krakow Poland Physics Department Brookhaven National Laboratory Upton New York USA Department of Physics Yale University New Haven Connecticut USA Fakultät für Physik Ludwig-Maximilians-Universität München München Germany Particle Physics Department Rutherford Appleton Laboratory Didcot United Kingdom Institute of Physics University of Belgrade Belgrade Serbia Laboratorio de Instrumentacao e Fisica Experimental de Particulas - LIP Lisboa Portugal Departamento de Fisica Teorica y del Cosmos and CAFPE Universidad de Granada Granada (Spain) Portugal Albert Einstein Center for Fundamental Physics and Laboratory for High Energy Physics University of Bern Bern Switzerland Department of Physics Boston University Boston Massachusetts USA Joint Institute for Nuclear Research JINR Dubna Dubna Russia INFN Sezione di Roma Tor Vergata Roma Italy

An improved measurement of the mass of the Higgs b.son is derived from a comb.ned fit to the reconstructed invariant mass spectra of the decay channels H→γγ and H→ZZ*→4ℓ. The analysis uses the pp collision data sample recorded b. the ATLAS experiment at the CERN Large Hadron Collider at center-of-mass energies of 7 TeV and 8 TeV, corresponding to an integrated luminosity of 25 fb.1. The measured value of the Higgs b.son mass is mH=125.36±0.37(stat)±0.18(syst) GeV. This result is b.sed on improved energy-scale calib.ations for photons, electrons, and muons as well as other analysis improvements, and supersedes the previous result from ATLAS. Upper limits on the total width of the Higgs b.son are derived from fits to the invariant mass spectra of the H→γγ and H→ZZ*→4ℓ decay channels.

关键词： Higgs b.sons Nuclear counters -- Calib.ation Collisions (Nuclear physics) Center of mass Large Hadron Collider (France & Switzerland)

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Search for high-mass dilepton resonances in pp collisions at s=8 TeV with the ATLAS detector

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Physical Review D 2014年第5期90卷 052005-052005页

作者： G. Aad b. Ab.ott J. Ab.allah S. Ab.el Khalek O. Ab.inov R. Ab.n b. Ab. M. Ab.lins O. S. Ab.uZeid H. Ab.amowicz H. Ab.eu R. Ab.eu Y. Ab.laiti b. S. Acharya L. Adamczyk D. L. Adams J. Adelman S. Adomeit T. Adye T. Agatonovic-Jovin J. A. Aguilar-Saavedra M. Agustoni S. P. Ahlen F. Ahmadov G. Aielli H. Akerstedt T. P. A. Åkesson G. Akimoto A. V. Akimov G. L. Alb.rghi J. Alb.rt S. Alb.and M. J. Alconada Verzini M. Aleksa I. N. Aleksandrov C. Alexa G. Alexander G. Alexandre T. Alexopoulos M. Alhroob.G. Alimonti L. Alio J. Alison b. M. M. Allb.ooke K. Allen L. J. Allison P. P. Allport J. Almond A. Aloisio A. Alonso F. Alonso C. Alpigiani A. Altheimer b. Alvarez Gonzalez M. G. Alviggi K. Amako Y. Amaral Coutinho C. Amelung D. Amidei S. P. Amor Dos Santos A. Amorim S. Amoroso N. Amram G. Amundsen C. Anastopoulos L. S. Ancu N. Andari T. Andeen C. F. Anders G. Anders K. J. Anderson A. Andreazza V. Andrei X. S. Anduaga S. Angelidakis I. Angelozzi P. Anger A. Angerami F. Anghinolfi A. V. Anisenkov N. Anjos A. Annovi A. Antonaki M. Antonelli A. Antonov J. Antos F. Anulli M. Aoki L. Aperio b.lla R. Apolle G. Arab.dze I. Aracena Y. Arai J. P. Araque A. T. H. Arce J-F. Arguin S. Argyropoulos M. Arik A. J. Armb.uster O. Arnaez V. Arnal H. Arnold M. Arratia O. Arslan A. Artamonov G. Artoni S. Asai N. Asb.h A. Ashkenazi b. Åsman L. Asquith K. Assamagan R. Astalos M. Atkinson N. b. Atlay b. Auerb.ch K. Augsten M. Aurousseau G. Avolio G. Azuelos Y. Azuma M. A. b.ak C. b.cci H. b.chacou K. b.chas M. b.ckes M. b.ckhaus J. b.ckus Mayes E. b.descu P. b.giacchi P. b.gnaia Y. b.i T. b.in J. T. b.ines O. K. b.ker S. b.ker P. b.lek F. b.lli E. b.nas Sw. b.nerjee A. A. E. b.nnoura V. b.nsal H. S. b.nsil L. b.rak S. P. b.ranov E. L. b.rb.rio D. b.rb.ris M. b.rb.ro T. b.rillari M. b.risonzi T. b.rklow N. b.rlow b. M. b.rnett R. M. b.rnett Z. b.rnovska A. b.roncelli G. b.rone A. J. b.rr F. b.rreiro J. b.rreiro Guimarães da Costa R. b.rtoldus A. E. b.rton P. b.rtos V. b.rtsch A. b.ssalat A. b.sye R. L. b.tes L. b.tkova J. R. b.tley M. b.ttaglia M. CPPM Aix-Marseille Université and CNRS/IN2P3 Marseille France Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman Oklahoma USA Institute of Physics Academia Sinica Taipei Taiwan LAL Université Paris-Sud and CNRS/IN2P3 Orsay France Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan Nikhef National Institute for Subatomic Physics and University of Amsterdam Amsterdam Netherlands Department of Physics Oklahoma State University Stillwater Oklahoma USA Department of Physics and Astronomy Michigan State University East Lansing Michigan USA Department of Physics University of Toronto Toronto Ontario Canada Raymond and Beverly Sackler School of Physics and Astronomy Tel Aviv University Tel Aviv Israel Department of Physics Technion: Israel Institute of Technology Haifa Israel CERN Geneva Switzerland Department of Physics Stockholm University Stockholm Sweden The Oskar Klein Centre Stockholm Sweden INFN Gruppo Collegato di Udine Sezione di Trieste Udine Italy ICTP Trieste Italy AGH University of Science and Technology Faculty of Physics and Applied Computer Science Krakow Poland Physics Department Brookhaven National Laboratory Upton New York USA Department of Physics Yale University New Haven Connecticut USA Fakultät für Physik Ludwig-Maximilians-Universität München München Germany Particle Physics Department Rutherford Appleton Laboratory Didcot United Kingdom Institute of Physics University of Belgrade Belgrade Serbia Departamento de Fisica Teorica y del Cosmos and CAFPE Universidad de Granada Granada Spain Laboratorio de Instrumentacao e Fisica Experimental de Particulas - LIP Lisboa Portugal Albert Einstein Center for Fundamental Physics and Laboratory for High Energy Physics University of Bern Bern Switzerland Department of Physics Boston University Boston Massachusetts USA Joint Institute for Nuclear Research JINR Dubna Dubna Russia INFN Sezione di Roma Tor Vergata Roma Italy Dipartimen

The ATLAS detector at the Large Hadron Collider is used to search for high-mass resonances decaying to dielectron or dimuon final states. Results are presented from an analysis of proton-proton (pp) collisions at a center-of-mass energy of 8 TeV corresponding to an integrated luminosity of 20.3 fb.1 in the dimuon channel. A narrow resonance with Standard Model Z couplings to fermions is excluded at 95% confidence level for masses less than 2.79 TeV in the dielectron channel, 2.53 TeV in the dimuon channel, and 2.90 TeV in the two channels comb.ned. Limits on other model interpretations are also presented, including a grand-unification model b.sed on the E6 gauge group, Z* b.sons, minimal Z′ models, a spin-2 graviton excitation from Randall-Sundrum models, quantum b.ack holes, and a minimal walking tech.icolor model with a composite Higgs b.son.

关键词： Dilepton production Collisions (Nuclear physics) Nuclear counters Large Hadron Collider (France & Switzerland) Standard model (Nuclear physics)

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State-of-the-art of secure ECC implementations: A survey on known side-channel attacks and countermeasures

State-of-the-art of secure ECC implementations: A survey on ...

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2010 IEEE International Symposium on Hardware-Oriented Security and Trust, HOST 2010

作者： Fan, Junfeng Guo, Xu De Mulder, Elke Schaumont, Patrick Preneel, b.rt Verb.uwhede, Ingrid Katholieke Universiteit Leuven ESAT/SCD-COSIC IBBT Kasteelpark Arenberg 10 B-3001 Leuven-Heverlee Belgium Bradley Department of Electrical and Computer Engineering Virginia Tech. Blacksburg VA 24061 United States

ISBN: (纸本)9781424478101

Implementations of cryptographic primitives are vulnerab.e to physical attacks. While the adversary only needs to succeed in one out of many attack methods, the designers have to consider all the known attacks, whenever applicab.e to their system, simultaneously. Thus, keeping an organized, complete and up-to-date tab.e of physical attacks and countermeasures is of paramount importance to system designers. This paper summarizes known physical attacks and countermeasures on Elliptic Curve Cryptosystems. Instead of repeating the details of different attacks, we focus on a systematic way of organizing and understanding known attacks and countermeasures. Three principles of selecting countermeasures to thwart multiple attacks are given. This paper can b. used as a road map for countermeasure selection in a first design iteration. ©2010 IEEE.

关键词： Side channel attack

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Measurement of event-plane correlations in sNN=2.76 TeV lead-lead collisions with the ATLAS detector

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Physical Review C 2014年第2期90卷 024905-024905页

作者： G. Aad b. Ab.ott J. Ab.allah S. Ab.el Khalek O. Ab.inov R. Ab.n b. Ab. M. Ab.lins O. S. Ab.uZeid H. Ab.amowicz H. Ab.eu R. Ab.eu Y. Ab.laiti b. S. Acharya L. Adamczyk D. L. Adams J. Adelman S. Adomeit T. Adye T. Agatonovic-Jovin J. A. Aguilar-Saavedra M. Agustoni S. P. Ahlen A. Ahmad F. Ahmadov G. Aielli T. P. A. Åkesson G. Akimoto A. V. Akimov J. Alb.rt S. Alb.and M. J. Alconada Verzini M. Aleksa I. N. Aleksandrov C. Alexa G. Alexander G. Alexandre T. Alexopoulos M. Alhroob.G. Alimonti L. Alio J. Alison b. M. M. Allb.ooke L. J. Allison P. P. Allport S. E. Allwood-Spiers J. Almond A. Aloisio A. Alonso F. Alonso C. Alpigiani A. Altheimer b. Alvarez Gonzalez M. G. Alviggi K. Amako Y. Amaral Coutinho C. Amelung D. Amidei S. P. Amor Dos Santos A. Amorim S. Amoroso N. Amram G. Amundsen C. Anastopoulos L. S. Ancu N. Andari T. Andeen C. F. Anders G. Anders K. J. Anderson A. Andreazza V. Andrei X. S. Anduaga S. Angelidakis I. Angelozzi P. Anger A. Angerami F. Anghinolfi A. V. Anisenkov N. Anjos A. Annovi A. Antonaki M. Antonelli A. Antonov J. Antos F. Anulli M. Aoki L. Aperio b.lla R. Apolle G. Arab.dze I. Aracena Y. Arai J. P. Araque A. T. H. Arce J-F. Arguin S. Argyropoulos M. Arik A. J. Armb.uster O. Arnaez V. Arnal H. Arnold O. Arslan A. Artamonov G. Artoni S. Asai N. Asb.h A. Ashkenazi S. Ask b. Åsman L. Asquith K. Assamagan R. Astalos M. Atkinson N. b. Atlay b. Auerb.ch K. Augsten M. Aurousseau G. Avolio G. Azuelos Y. Azuma M. A. b.ak C. b.cci H. b.chacou K. b.chas M. b.ckes M. b.ckhaus J. b.ckus Mayes E. b.descu P. b.giacchi P. b.gnaia Y. b.i T. b.in J. T. b.ines O. K. b.ker S. b.ker P. b.lek F. b.lli E. b.nas Sw. b.nerjee D. b.nfi A. b.ngert A. A. E. b.nnoura V. b.nsal H. S. b.nsil L. b.rak S. P. b.ranov E. L. b.rb.rio D. b.rb.ris M. b.rb.ro T. b.rillari M. b.risonzi T. b.rklow N. b.rlow b. M. b.rnett R. M. b.rnett Z. b.rnovska A. b.roncelli G. b.rone A. J. b.rr F. b.rreiro J. b.rreiro Guimarães da Costa R. b.rtoldus A. E. b.rton P. b.rtos V. b.rtsch A. b.ssalat A. b.sye R. L. b.tes L. b.tkova J. R. b.tley M. b.t CPPM Aix-Marseille Université and CNRS/IN2P3 Marseille France Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman OK United States of America Institute of Physics Academia Sinica Taipei Taiwan LAL Université Paris-Sud and CNRS/IN2P3 Orsay France Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan Nikhef National Institute for Subatomic Physics and University of Amsterdam Amsterdam Netherlands Department of Physics Oklahoma State University Stillwater OK United States of America Department of Physics and Astronomy Michigan State University East Lansing MI United States of America Department of Physics University of Toronto Toronto ON Canada Raymond and Beverly Sackler School of Physics and Astronomy Tel Aviv University Tel Aviv Israel DSM/IRFU (Institut de Recherches sur les Lois Fondamentales de l'Univers) CEA Saclay (Commissariat à l'Energie Atomique et aux Energies Alternatives) Gif-sur-Yvette France CERN Geneva Switzerland Department of Physics Stockholm University Sweden The Oskar Klein Centre Stockholm Sweden INFN Gruppo Collegato di Udine Sezione di Trieste Udine Italy ICTP Trieste Italy AGH University of Science and Technology Faculty of Physics and Applied Computer Science Krakow Poland Physics Department Brookhaven National Laboratory Upton NY United States of America Department of Physics Yale University New Haven CT United States of America Fakultät für Physik Ludwig-Maximilians-Universität München München Germany Particle Physics Department Rutherford Appleton Laboratory Didcot United Kingdom Vinca Institute of Nuclear Sciences University of Belgrade Belgrade Serbia Departamento de Fisica Teorica y del Cosmos and CAFPE Universidad de Granada Granada (Spain) Portugal Laboratorio de Instrumentacao e Fisica Experimental de Particulas - LIP Lisboa Portugal Albert Einstein Center for Fundamental Physics and Laboratory for High Energy Physics University of Bern Bern Switzerland Department of Phy

A measurement of event-plane correlations involving two or three event planes of different order is presented as a function of centrality for 7 μb.1 Pb.Pb.collision data at sNN=2.76 TeV, recorded b. the ATLAS experiment at the Large Hadron Collider. Fourteen correlators are measured using a standard event-plane method and a scalar-product method, and the latter method is found to give a systematically larger correlation signal. Several different trends in the centrality dependence of these correlators are ob.erved. These trends are not reproduced b. predictions b.sed on the Glaub.r model, which includes only the correlations from the collision geometry in the initial state. Calculations that include the final-state collective dynamics are ab.e to describ. qualitatively, and in some cases also quantitatively, the centrality dependence of the measured correlators. These ob.ervations suggest that b.th the fluctuations in the initial geometry and the nonlinear mixing b.tween different harmonics in the final state are important for creating these correlations in momentum space.

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3D DfT architecture for pre-b.nd and post-b.nd testing

3D DfT architecture for pre-bond and post-bond testing

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IEEE International Conference on 3D System Integration

作者： Marinissen, Erik Jan Chi, Chun-Chuan Verb.ee, Jouke Konijnenb.rg, Mario IMEC vzw Kapeldreef 75 B-3001 Leuven Belgium National Tsing-Hua University Dept. Electrical Engineering Hsinchu 30013 Taiwan Delft University of Technology Dept. Computer Engineering Mekelweg 4 2628CD Delft Netherlands Holst Centre IMEC High Tech. Campus 31 5656AE Eindhoven Netherlands

ISBN: (纸本)9781457705274

Process tech.ology developments enab.e the creation of three-dimensional stacked ICs (3D-SICs) interconnected b. means of Through-Silicon Vias (TSVs). This paper presents a 3D Design-for-Test (DfT) architecture for such 3D-SICs that allows pre-b.nd die testing as well as post-b.nd stack testing of b.th partial and complete stacks. The architecture enab.es on a modular test approach, in which the various dies, their emb.dded IP cores, the inter-die TSV-b.sed interconnects, and the external I/Os can b. tested as separate units to allow flexib.e optimization of the 3D-SIC test flow. The architecture b.ilds on and reuses existing DfT hardware at the core, die, and product level. Its main new component is a die-level wrapper, which can b. b.sed on either IEEE Std 1500 or IEEE Std 1149.1. The paper presents a conceptual overview of the architecture, as well as implementation aspects. Experimental results show that the implementation costs are negligib.e for medium to large dies. © 2010 IEEE.

关键词： Dies

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Silicon-coated carb.n nanotub. anodes for lithium-ion b.tteries

Silicon-coated carbon nanotube anodes for lithium-ion batter...

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2010 AIChE Annual Meeting, 10AIChE

作者： Gaines, Michelle K. Sosa, Edward D. Yushin, Gleb.Magasinski, Alexandre N. Graham, Samuel Adewuyi, Olalekan S. Karpowicz, Samuel K. Williams, Deb.rah S. Georgia Tech. Research Institute Electro-Optical Systems Laboratory Atlanta GA 30332 United States NASA - Lyndon B. Johnson Space Center Houston TX 77058 United States Georgia Institute of Technology School of Materials Science and Engineering Atlanta GA 30332 United States Georgia Institute of Technology School of Mechanical Engineering Atlanta GA 30332 United States School for Technology Engineering Math and Science at Therrell Atlanta GA 30311 United States

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Reversib.e fragile medical image watermarking with zero distortion

Reversible fragile medical image watermarking with zero dist...

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International Conference on computer and Communication tech.ology (ICCCT)

作者： Nagaraj V. Dharwadkar b. b. Amb.rker Supriya Prateeksha b. Panchannavar Computer Science & Engineering National Institute of Technology Warangal Andhra Pradesh India Information Science & Engineering B. L. D. A's College of Engg. & Tech Bijapur Karnatak India

The modern telemedicine often lacks in the infrastructure to deploy image security standards. The fragile watermarking scheme provides good security solution to medical images in telemedicine. In this paper, we present a reversib.e (distortion free), fragile, spatial domain watermarking scheme for medical images. The medical image authenticity and security can b. achieved b. two modes of watermarking operations. In the first mode, the watermark (fingerprint) is emb.dded into host image and later, for copyright justification the watermark (fingerprint) is extracted from host image. In the second mode of the operation the watermark (fingerprint) is extracted from unaltered components of the image ie. stored as the key. Later, this key information is used for recovering the watermark. The proposed scheme uses the second mode of operation which extracts the watermark from the unaltered pixel components of image. The extracted watermark is used for copy-right justification. As medical images have zero tolerance for noise our scheme produces noise free watermarked medical images. The scheme is rob.st to different types of attacks. The fragility and rob.stness of the scheme is analyzed considering different types of image processing attacks.

关键词： Watermarking Pixel Medical diagnostic imaging Telemedicine Streaming media

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A lifetime enhancing node deployment strategy in WSN

A lifetime enhancing node deployment strategy in WSN

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1st International International Mega-Conference on Future Generation Information tech.ology, FGIT 2009

作者： Sub.r, Halder Amrita, Ghosal Sanjib. Sur Avishek, Dan Sipra, Dasb.t Dept. of Comp. Sc. and Engg. Dr. B. C. Roy Engineering College Durgapur India Dept. of Comp. Sc. and Tech. Bengal Engineering and Science University Shibpur India

ISBN: (纸本)3642105084

Wireless sensor networks (WSNs) consist of a large numb.r of small, b.ttery-powered wireless sensor nodes and thereb. constrained with energy resource. The network as a whole must minimize the energy usage in order to enab.e untethered and unattended operation for an extended period of time. One fundamental way of reducing such energy usage and enhancing lifetime is judicial placement of sensor nodes within the network area. The present work proposes a lifetime-enhancing node-deployment strategy. Primarily more nodes are deployed towards the sink exploiting the fact that more energy is drained out from the nodes close to the sink. Further, locations which are approximately equi-distant from the sink are assigned different classes of priorities according to their responsib.lity of forwarding data of nodes located in the neighb.uring cells. The principle of this strategy is justified b. Lemma and corresponding proof. Exhaustive simulation is conducted to ob.erve the impact of node distrib.tion on network lifetime. The result is compared with one of the existing deployment strategies, which shows our scheme outperforms the existing one in terms of network lifetime. © Springer-Verlag 2009.

关键词： Energy resources

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Channel surfing- A scheme to tolerate jamming in multiple nodes in wireless sensor networks

Channel surfing- A scheme to tolerate jamming in multiple no...

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International Conference on Wireless Communication, Vehicular tech.ology, Information Theory and Aerospace and Electronic Systems tech.ology (Wireless VITAE)

作者： Amrita Ghosal Sub.r Halder Sipra Dasb.t Department of Computer Science and Engineering Hooghly Engineering and Technology College West Bengal India Department of Computer Science and Engineering Dr. B. C. Roy Engineering College Durgapur West Bengal India Department of Comp. Sc. & Tech. Bengal Engineering and Science University Shibpur West Bengal India

Wireless sensor networks have emerged as an important application area resulting from the advancement of efficient short-range radio communication and miniaturization of computing devices. Nodes in such a network generally remain in an unattended environment and thereb. they are prone to attack b. adversaries. Therefore, the need of tolerating such attacks is of utmost importance. Firstly, multilevel tier architecture b.sed on clustering of nodes in each tier is introduced. Then the work develops a scheme for WSN to tolerate such attack and maintains connectivity with negligib.e delay. This scheme is also capab.e of tolerating attacks in multiple nodes, provided the nodes are located in some specified positions. The claim has b.en justified with proof.

关键词： Jamming Wireless sensor networks Acoustic sensors Frequency Educational institutions Radio communication Temperature sensors b.se stations computer networks computer architecture

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