Une architecture de test passif appliquée à la détection des attaques dans les réseaux ad hoc

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ISBN 13 :
Total Pages : 158 pages
Book Rating : 4.:/5 (493 download)

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Book Synopsis Une architecture de test passif appliquée à la détection des attaques dans les réseaux ad hoc by : Jean-Marie Orset

Download or read book Une architecture de test passif appliquée à la détection des attaques dans les réseaux ad hoc written by Jean-Marie Orset and published by . This book was released on 2007 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: Les réseaux ad hoc constituent un concept très prometteur dans le domaine des réseaux informatiques. Malheureusement, leur évolution est actuellement freinée par les problèmes de sécurité qui viennent pertuber le processus d'acheminement des données. Les systèmes de détection d'intrusions apparaissent comme un outil idéal pour limiter les attaques sur le protocole de routage. Cependant, les solutions existantes ne sont pas toujours adaptées aux caractéristiques bien spécifiques des réseaux ad hoc. Dans cette thèse, nous présentons une architecture de détection d'attaque inspirée des techniques de test de conformité. Nous proposons ainsi un algotithme de test passif qui recherche les anomalies dans une trace d'exécution du protocole, en comparant les évènements collectés avec ce qui est attendu par la spécification. Pour accroître le pouvoir de détection de notre algorithme, nous proposons une méthode de détermination des contraintes initiales. L'utilisation de méthodes formelles et de techniques de test permet ainsi de combiner les avantages des deux approches classiques de détection (comportementale et par scénario), à savoir la capacité de détecter des attaques inconnues, tout en ne générant pas d'alertes inutiles. Nous proposons également une méthodologie pour détecter de nouvelles attaques à partir de l'observation de situations typiques de blocage. Celle-ci inclut un algorithme de recherche en arrière qui, en explorant le passé de la trace, permet d'exhiber une séquence d'entrée/sortie suspecte.

Contributions à la détection des comportements malhonnêtes dans les réseaux ad hoc AODV par analyse de la confiance implicite

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ISBN 13 :
Total Pages : 132 pages
Book Rating : 4.:/5 (758 download)

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Book Synopsis Contributions à la détection des comportements malhonnêtes dans les réseaux ad hoc AODV par analyse de la confiance implicite by : Mohamed Ali Ayachi

Download or read book Contributions à la détection des comportements malhonnêtes dans les réseaux ad hoc AODV par analyse de la confiance implicite written by Mohamed Ali Ayachi and published by . This book was released on 2011 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: La constante évolution des technologies de l’information et le penchant vers l’utilisation des machines sans fil qui se sont imposées ces dernières années ont fait émerger un nouveau type de réseaux : les réseaux sans-fil ad hoc, ou MANET (Mobile Ad hoc NETwork). Se souciant de pouvoir communiquer et de partager l’information dans n’importe quelle situation, les réseaux ad hoc sont des systèmes autonomes composés par un ensemble d’entités mobiles libres de se déplacer sans contraintes. Ces entités utilisent le médium radio pour communiquer et forment un réseau n’utilisant aucune infrastructure existante. Dans cette thèse, nous nous intéressons à sécuriser les protocoles de routage ad hoc en proposant des mécanismes de détection des actions malveillantes pour consolider les protocoles de routage et prévenir les futures attaques. Nous nous basons sur la confiance développée entre les entités pour bâtir un raisonnement sur le comportement des entités voisines. Ceci passe par une comparaison des messages échangés entre les entités du réseau ad hoc ou encore par l’analyse des incohérences dans les annonces et les ouvertures de routes afin de détecter la malhonnêteté ou la compromission d’une entité mobile. Nous choisissons d’appliquer cette approche sur le protocole réactif AODV. L’évaluation des performances de ce système de détection montre la pertinence du raisonnement sans pour autant influencer les performances du protocole. Une étude portant sur les cas de faux-positifs est aussi effectuée : nous proposons une solution pour les limiter en se basant sur le fait de ne prendre une décision que si l’entité est sûre de l’action malhonnête du voisin.

Un modèle de détection d'intrusions distribuée pour les réseaux sans fil ad hoc

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ISBN 13 :
Total Pages : 171 pages
Book Rating : 4.:/5 (493 download)

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Book Synopsis Un modèle de détection d'intrusions distribuée pour les réseaux sans fil ad hoc by : Jean-Marc Percher

Download or read book Un modèle de détection d'intrusions distribuée pour les réseaux sans fil ad hoc written by Jean-Marc Percher and published by . This book was released on 2004 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dans cette thèse nous proposons un modèle de sécurité pour les MANET (Mobile Ad hoc NETwork). Celui-ci associe les actions des mécanismes de sécurité préventifs et d'un système de détection d'intrusions ou IDS (Intrusion Detection System). Notre recherche est centrée sur l'IDS dont l'architecture doit être adaptée aux caractéristiques des MANET : l'absence d'infrastructure réseau préexistante et permanente, l'hétérogénéité des équipements, l'instabilité de la topologie résultant du mouvement des nœuds, et la difficulté à identifier les nœuds présents dans le réseau. Nous proposons une architecture d'IDS distribuée et coopérative basée sur des agents mobiles. Nous montrons par des simulations comment les agents mobiles permettent d'améliorer la fiabilité de la coopération entre les IDS. Nous présentons un prototype utilisé pour valider, dans un environnement de tests, les caractéristiques de l'IDS distribué et évaluer ses performances

Sécurisation des réseaux ad hoc

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ISBN 13 :
Total Pages : 159 pages
Book Rating : 4.:/5 (8 download)

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Book Synopsis Sécurisation des réseaux ad hoc by : Boussad Aït-Salem

Download or read book Sécurisation des réseaux ad hoc written by Boussad Aït-Salem and published by . This book was released on 2011 with total page 159 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'évolution rapide des technologies sans fil a permis l'émergence de nouveaux types de réseaux très dynamiques avec des architectures fortement décentralisées et dont les services sont organisés de manière autonome. Ces spécificités sont à double tranchant, car, d'une part, elles permettent une mise en place peu coûteuse et rapide de ces réseaux, et d'autre part, elles engendrent des difficultés lors de la conception de certains services tels que le routage, la qualité de service, la sécurité, etc.. Dans le cadre de cette thèse, on s'est intéressé à la sécurité des systèmes de confiance dans ces réseaux. En l'absence d'une entité centrale, les entités doivent s'évaluer les unes les autres et agréger les résultats. Pour que les évaluations soient faites sans crainte, il faut que les valeurs de celles-ci restent secrètes jusqu'à l'agrégation. Dans ce manuscrit, nous allons essayer d'apporter une solution à ce problème en proposant un schéma, basé sur un chiffrement homomorphe et sur le protocole d'envoi superposé, qui permette à chaque entité de calculer la valeur de confiance d'une autre entité tout en protégeant les données privées des entités engagées dans ce calcul. Nous avons construit notre schéma dans le cadre du modèle semi-honnête. Nous donnons, à ce titre, des preuves de sécurité qui montrent que notre schéma respecte ce modèle et en particulier qu'il est résistant à une collusion de n - 1 participants, n’étant le nombre de participants au calcul. En termes de performance, il est également démontré que notre proposition réduit le coût des communications par rapport aux propositions antérieures. Par ailleurs, l'absence d'une entité de confiance dans les réseaux ad hoc tels que les réseaux de capteurs (p. ex., une autorité de certification) peut aussi causer des problèmes au niveau de la gestion et de l'authentification des utilisateurs. En effet, à cause de la faible protection physique des capteurs et de l'environnement hostile dans lequel ils sont déployés, un attaquant peut facilement construire plusieurs répliques d'un nœud capturé et ainsi outrepasser le mécanisme d'authentification mis en place. Dans ce manuscrit, nous proposons une nouvelle approche de détection de répliques qui est autonome, résistante aux attaques, engendrant un coût de communication de O(√n) et ne nécessitant aucune sauvegarde au niveau des capteurs.

Moving Target Defense

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Publisher : Springer Science & Business Media
ISBN 13 : 1461409772
Total Pages : 196 pages
Book Rating : 4.4/5 (614 download)

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Book Synopsis Moving Target Defense by : Sushil Jajodia

Download or read book Moving Target Defense written by Sushil Jajodia and published by Springer Science & Business Media. This book was released on 2011-08-26 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: Moving Target Defense: Creating Asymmetric Uncertainty for Cyber Threats was developed by a group of leading researchers. It describes the fundamental challenges facing the research community and identifies new promising solution paths. Moving Target Defense which is motivated by the asymmetric costs borne by cyber defenders takes an advantage afforded to attackers and reverses it to advantage defenders. Moving Target Defense is enabled by technical trends in recent years, including virtualization and workload migration on commodity systems, widespread and redundant network connectivity, instruction set and address space layout randomization, just-in-time compilers, among other techniques. However, many challenging research problems remain to be solved, such as the security of virtualization infrastructures, secure and resilient techniques to move systems within a virtualized environment, automatic diversification techniques, automated ways to dynamically change and manage the configurations of systems and networks, quantification of security improvement, potential degradation and more. Moving Target Defense: Creating Asymmetric Uncertainty for Cyber Threats is designed for advanced -level students and researchers focused on computer science, and as a secondary text book or reference. Professionals working in this field will also find this book valuable.

Network Intrusion Detection

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Publisher : Sams Publishing
ISBN 13 : 9780735712652
Total Pages : 84 pages
Book Rating : 4.7/5 (126 download)

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Book Synopsis Network Intrusion Detection by : Stephen Northcutt

Download or read book Network Intrusion Detection written by Stephen Northcutt and published by Sams Publishing. This book was released on 2002 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a training aid and reference for intrusion detection analysts. While the authors refer to research and theory, they focus their attention on providing practical information. New to this edition is coverage of packet dissection, IP datagram fields, forensics, and snort filters.

Terra 2008

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Publisher : Getty Publications
ISBN 13 : 1606060430
Total Pages : 438 pages
Book Rating : 4.6/5 (6 download)

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Book Synopsis Terra 2008 by : Leslie Rainer

Download or read book Terra 2008 written by Leslie Rainer and published by Getty Publications. This book was released on 2011-06-14 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: Earthen architecture constitutes one of the most diverse forms of cultural heritage and one of the most challenging to preserve. It dates from all periods and is found on all continents but is particularly prevalent in Africa, where it has been a building tradition for centuries. Sites range from ancestral cities in Mali to the palaces of Abomey in Benin, from monuments and mosques in Iran and Buddhist temples on the Silk Road to Spanish missions in California. This volume's sixty-four papers address such themes as earthen architecture in Mali, the conservation of living sites, local knowledge systems and intangible aspects, seismic and other natural forces, the conservation and management of archaeological sites, research advances, and training.

Body and Spirit in the Middle Ages

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Publisher : Walter de Gruyter GmbH & Co KG
ISBN 13 : 3110615983
Total Pages : 312 pages
Book Rating : 4.1/5 (16 download)

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Book Synopsis Body and Spirit in the Middle Ages by : Gaia Gubbini

Download or read book Body and Spirit in the Middle Ages written by Gaia Gubbini and published by Walter de Gruyter GmbH & Co KG. This book was released on 2020-08-10 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: A crucial question throughout the Middle Ages, the relationship between body and spirit cannot be understood without an interdisciplinary approach – combining literature, philosophy and medicine. Gathering contributions by leading international scholars from these disciplines, the collected volume explores themes such as lovesickness, the five senses, the role of memory and passions, in order to shed new light on the complex nature of the medieval Self.

Network Intrusion Detection

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Publisher : New Riders Publishing
ISBN 13 :
Total Pages : 488 pages
Book Rating : 4.0/5 ( download)

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Book Synopsis Network Intrusion Detection by : Stephen Northcutt

Download or read book Network Intrusion Detection written by Stephen Northcutt and published by New Riders Publishing. This book was released on 2001 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: Intrusion detection is one of the hottest growing areas of network security. As the number of corporate, government, and educational networks grow and as they become more and more interconnected through the Internet, there is a correlating increase in the types and numbers of attacks to penetrate those networks. Intrusion Detection, Second Edition is a training aid and reference for intrusion detection analysts. This book is meant to be practical. The authors are literally the most recognized names in this specialized field, with unparalleled experience in defending our country s government and military computer networks. People travel from all over the world to hear them speak, and this book will be a distillation of that experience. The book's approach is to introduce and ground topics through actual traffic patterns. The authors have been through the trenches and give you access to unusual and unique data.

Parliamentary Oversight of the Security Sector

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Publisher : DCAF
ISBN 13 : 8683543102
Total Pages : 209 pages
Book Rating : 4.6/5 (835 download)

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Book Synopsis Parliamentary Oversight of the Security Sector by : Philipp Fluri

Download or read book Parliamentary Oversight of the Security Sector written by Philipp Fluri and published by DCAF. This book was released on 2003 with total page 209 pages. Available in PDF, EPUB and Kindle. Book excerpt:

ELexicography in the 21st Century : New Challenges, New Applications

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Publisher : Presses univ. de Louvain
ISBN 13 : 2874632112
Total Pages : 475 pages
Book Rating : 4.8/5 (746 download)

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Book Synopsis ELexicography in the 21st Century : New Challenges, New Applications by : Sylviane Granger

Download or read book ELexicography in the 21st Century : New Challenges, New Applications written by Sylviane Granger and published by Presses univ. de Louvain. This book was released on 2010-06 with total page 475 pages. Available in PDF, EPUB and Kindle. Book excerpt: The field of lexicography is undergoing a major revolution. The rapid replacement of the traditional paper dictionary by electronic dictionaries opens up exciting possibilities but also constitutes a major challenge to the field. The eLexicography in the 21st Century: New Challenges, New Applications conference organized by the Centre for English Corpus Linguistics of the Université catholique de Louvain in October 2009 aimed to bring together the many researchers around the world who are working in the fast developing field of electronic lexicography and to act as a showcase for the latest lexicographic developments and software solutions in the field. The conference attracted both academics and industrial partners from 30 different countries who presented electronic dictionary projects dealing with no less than 22 languages. The resulting proceedings volume bears witness to the tremendous vitality and diversity of research in the field. The volume covers a wide range span of topics, including: -the use of language resources for lexicographic purposes, in the form of lexical databases like WordNet or corpora of different types - innovative changes to the dictionary structure afforded by the electronic medium, in particular multiple access routes and efficient integration of phraseology -specialised dictionaries (e.g. SMS dictionaries, sign language dictionaries) -automated customisation of dictionaries in function of users' needs -exploitation of Natural Language Processing tools - integration of electronic dictionaries into language learning and teaching

The Disappearing Computer

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Publisher : Springer
ISBN 13 : 3540727272
Total Pages : 314 pages
Book Rating : 4.5/5 (47 download)

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Book Synopsis The Disappearing Computer by : Norbert Streitz

Download or read book The Disappearing Computer written by Norbert Streitz and published by Springer. This book was released on 2007-07-20 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book examines how the computer, as we currently know it, will be replaced by a new generation of technologies, moving computing off the desktop and ultimately integrating it with real world objects and everyday environments. It provides a unique combination of concepts, methods and prototypes of ubiquitous and pervasive computing reflecting the current interest in smart environments and ambient intelligence.

AGENT-BASED UBIQUITOUS COMPUTING

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Publisher : Springer Science & Business Media
ISBN 13 : 9491216317
Total Pages : 206 pages
Book Rating : 4.4/5 (912 download)

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Book Synopsis AGENT-BASED UBIQUITOUS COMPUTING by : Javier Carbo

Download or read book AGENT-BASED UBIQUITOUS COMPUTING written by Javier Carbo and published by Springer Science & Business Media. This book was released on 2010-06-01 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ubiquitous computing names the third wave in computing, where the personal computing era appears when technologyrecedesinto the backgroundof our lives. The widespread use of new mobile technology implementing wireless communicationssuch as personal digital assistants (PDAs) and smart phones enables a new type of advanced applications. In the pastyears,themainfocusofresearchinmobileserviceshasaimedattheanytime-anywhere principle (ubiquitous computing). However, there is more to it. The increasing demand for distributed problem solving led to the development of multi-agent systems. The latter are formed from a collection of independent software entities whose collective skills can be applied in complex and real-time domains. The target of such systems is to demonstrate howgoaldirected,robustandoptimalbehaviorcanarise frominteractionsbetweenindiv- ual autonomous intelligent software agents. These software entities exhibit characteristics like autonomy, responsiveness, pro-activeness and social ability. Their functionality and effectiveness has proven to be highly depended on the design and development and the - plication domain. In fact, in several cases, the design and developmentof effective services shouldtakeintoaccountthecharacteristicsofthecontextfromwhichaserviceisrequested. Contextis the set of suitable environmentalstates and settings concerninga user, which are relevant for a situation sensitive application in the process of adapting the services and - formation offered to the user. Agent technology seems to be the right technology to offer the possibility of exploringthe dynamic context of the user in order to provideadded-value services or to execute more and complex tasks.

Signal Detection Theory and ROC-analysis

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Publisher :
ISBN 13 :
Total Pages : 312 pages
Book Rating : 4.X/5 (1 download)

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Book Synopsis Signal Detection Theory and ROC-analysis by : James P. Egan

Download or read book Signal Detection Theory and ROC-analysis written by James P. Egan and published by . This book was released on 1975 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:

E-Lexicography

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Publisher : A&C Black
ISBN 13 : 1441128069
Total Pages : 357 pages
Book Rating : 4.4/5 (411 download)

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Book Synopsis E-Lexicography by : Pedro A. Fuertes-Olivera

Download or read book E-Lexicography written by Pedro A. Fuertes-Olivera and published by A&C Black. This book was released on 2011-10-20 with total page 357 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book looks at current research and future directions in e-lexicography. Online dictionaries and reference tools are increasingly prevalent in a digitized and internet-led era in language study that has embraced computational linguistics. This book responds with theoretical and practical analysis of key topics, from a global range of contributors. Since COBUILD in the 1980s, lexicographers have found it essential to engage with and utilize electronic computational tools. Internet dictionaries, online reference tools and even search engine optimization demand a knowledge of electronic lexicography and force a reassessment of the field. This volume looks at, amongst other topics: • Polyfunctional versus monofunctional dictionary tools • Developing theories of lexicography for electronic mediums • Distinguishing between the database and the dictionary • Online dictionaries not as data repositories but as sophisticated search engines This volume will appeal to scholars in lexicography and to practicing lexicographers.

Quantum Communications and Cryptography

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Publisher : CRC Press
ISBN 13 : 1420026607
Total Pages : 248 pages
Book Rating : 4.4/5 (2 download)

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Book Synopsis Quantum Communications and Cryptography by : Alexander V. Sergienko

Download or read book Quantum Communications and Cryptography written by Alexander V. Sergienko and published by CRC Press. This book was released on 2018-10-03 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: All current methods of secure communication such as public-key cryptography can eventually be broken by faster computing. At the interface of physics and computer science lies a powerful solution for secure communications: quantum cryptography. Because eavesdropping changes the physical nature of the information, users in a quantum exchange can easily detect eavesdroppers. This allows for totally secure random key distribution, a central requirement for use of the one-time pad. Since the one-time pad is theoretically proven to be undecipherable, quantum cryptography is the key to perfect secrecy. Quantum Communications and Cryptography is the first comprehensive review of the past, present, and potential developments in this dynamic field. Leading expert contributors from around the world discuss the scientific foundations, experimental and theoretical developments, and cutting-edge technical and engineering advances in quantum communications and cryptography. The book describes the engineering principles and practical implementations in a real-world metropolitan network as well as physical principles and experimental results of such technologies as entanglement swapping and quantum teleportation. It also offers the first detailed treatment of quantum information processing with continuous variables. Technologies include both free-space and fiber-based communications systems along with the necessary protocols and information processing approaches. Bridging the gap between physics and engineering, Quantum Communications and Cryptography supplies a springboard for further developments and breakthroughs in this rapidly growing area.

Building Wireless Community Networks

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Publisher : "O'Reilly Media, Inc."
ISBN 13 : 9780596005023
Total Pages : 190 pages
Book Rating : 4.0/5 (5 download)

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Book Synopsis Building Wireless Community Networks by : Rob Flickenger

Download or read book Building Wireless Community Networks written by Rob Flickenger and published by "O'Reilly Media, Inc.". This book was released on 2003 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: Building Wireless Community Networks is about getting people online using wireless network technology. The 802.11b standard (also known as WiFi) makes it possible to network towns, schools, neighborhoods, small business, and almost any kind of organization. All that's required is a willingness to cooperate and share resources. The first edition of this book helped thousands of people engage in community networking activities. At the time, it was impossible to predict how quickly and thoroughly WiFi would penetrate the marketplace. Today, with WiFi-enabled computers almost as common as Ethernet, it makes even more sense to take the next step and network your community using nothing but freely available radio spectrum. This book has showed many people how to make their network available, even from the park bench, how to extend high-speed Internet access into the many areas not served by DSL and cable providers, and how to build working communities and a shared though intangible network. All that's required to create an access point for high-speed Internet connection is a gateway or base station. Once that is set up, any computer with a wireless card can log onto the network and share its resources. Rob Flickenger built such a network in northern California, and continues to participate in network-building efforts. His nuts-and-bolts guide covers: Selecting the appropriate equipment Finding antenna sites, and building and installing antennas Protecting your network from inappropriate access New network monitoring tools and techniques (new) Regulations affecting wireless deployment (new) IP network administration, including DNS and IP Tunneling (new) His expertise, as well as his sense of humor and enthusiasm for the topic, makes Building Wireless Community Networks a very useful and readable book for anyone interested in wireless connectivity.