Download or read book Enhancing the Robustness and Security of Localization Schemes Through Effective Location Verification in Wireless Sensor Networks written by Dawood Al-Abri and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In addition, we perform a security analysis on the proposed scheme to assess its robustness to various attacks that may hinder the protocol operation. Our results show that a high coverage could be achieved using a relatively small number of verifiers. Moreover, we demonstrate that the proposed protocol is robust against location spoofing attacks. Then, we study how to schedule the verification service, and propose a scheduling scheme based on random access. Results show a high service throughput while maintaining a reasonable response delay its performance is better than TDMA-like clustering-based schemes when the interference between clusters is taken into account. We then turn our attention to study the problem of the impact of localization error on the performance of location verification. We examine how our proposed CORVA protocol with respect to how the verification probability varies with error parameters. We also present an abstract model to study the problem in a more general setting. Based on the proposed model, we analyze four combinations of localization and location verification schemes. Our study indicates that an effective verification protocol must have a built-in mechanism to handle effectively the localization error present in most practical localization schemes. Finally, we focus on exploiting the location verification as a feedback mechanism to improve the localization accuracy. We propose several novel location verification feedback (LV-FEED) algorithms to improve the localization accuracy. Analysis of these algorithms shows that a significant improvement in localization accuracy can be accomplished in a few iterations of executing the location verification feedback schemes.

Download or read book Security and Robustness of Localization Techniques for Emergency Sensor Networks written by Murtuza Shabbir Jadliwala and published by . This book was released on 2008 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent advancement in radio and processor technology has seen the rise of Wireless Sensor Networks (WSN) as a reliable and cost-effective tool for real-time information gathering and analysis tasks during emergency scenarios like natural disasters, terrorist attacks, military conflicts, etc. Post-deployment localization is extremely important and necessary in these applications. But, current distributed localization approaches are not designed for such highly hostile and dynamic network conditions. This dissertation studies the adverse effects of factors like cheating behavior, node disablement and measurement inconsistencies on the corresponding localization protocols and attempts to provide simple and efficient solutions in order to overcome these problems. The first problem addressed in this dissertation is, how to perform efficient distance-based localization in the presence of cheating beacon nodes? This dissertation attempts to answer two fundamental questions in distance-based localization: (i) In the presence of cheating beacons, what are the necessary and sufficient conditions to guarantee a bounded localization error? and (ii) Under these conditions, what class of algorithms can provide that error bound? In this part of the dissertation, it is shown that when the number of cheating beacons is greater than or equal to some threshold, there is no localization algorithm that can guarantee a bounded error. Furthermore, it is also proved that when the number of malicious beacons is below that threshold, a non-empty class of bounded error localization algorithms can be identified. Two secure distance-based localization algorithms are outlined and their performance is verified using simulation experiments. The next part of the dissertation underscores the lack of fault-tolerance in existing localization protocols and proposes simple mechanisms to overcome this problem. Sensor node disablement adversely affects the overall node deployment distribution and the efficiency of localization techniques that depend on this distribution, for example, signature-based techniques. In order to improve the fault-tolerance in these schemes, it is important to first construct a probabilistic model for node disablement. In this direction, the phenomenon of sensor node disablement is modeled as a stochastic time process. A novel deployment strategy that non-uniformly deploys sensor nodes over the monitored area is also outlined. Then, a fault-tolerance related improvement to existing localization schemes is proposed, which discards observations from unhealthy groups of nodes during the localization process. In order to overcome the complexity concerns, a simple signature-based technique, called ASFALT, is also proposed. ASFALT estimates the target location by first predicting distances to known location references using the underlying node distribution and a simple averaging argument. Extensive measurements from simulation experiments verify the fault-tolerance and performance of the proposed solutions. In the final part of this dissertation, the problem of efficiently mitigating inconsistencies in location-based applications is addressed. Inconsistencies in location information, caused by cheating behavior or measurement errors can be modeled using a weighted, undirected graph and a cheating location function that can assign incorrect locations to the nodes or a cheating (but verifiable) distance function that can assign inconsistent distances to edges. In either case, an edge relation where the assigned edge distance is not within some very small factor of the Euclidean distance between the connecting nodes represents some inconsistency and is referred to as an inconsistent edge. The problem of efficiently mitigating location inconsistencies in the network can then be formulated as an optimization problem that determines the largest induced subgraph (obtained by eliminating a subset of vertices) containing only consistent edges. Two optimization problems can be stated. The first maximizes the number of vertices in the consistent subgraph, while the second maximizes the number of consistent edges in the consistent subgraph. Combinatorial properties including hardness and approximation ratio for these problems are studied and intelligent solution strategies are proposed. A comparative analysis that verifies the practical efficiency of these algorithms by using measurements from simulation experiments is also presented.

Download or read book Localization Algorithms and Strategies for Wireless Sensor Networks Monitoring and Surveillance Techniques for Target Tracking written by Mao, Guoqiang and published by IGI Global. This book was released on 2009-05-31 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wireless localization techniques are an area that has attracted interest from both industry and academia, with self-localization capability providing a highly desirable characteristic of wireless sensor networks. Localization Algorithms and Strategies for Wireless Sensor Networks encompasses the significant and fast growing area of wireless localization techniques. This book provides comprehensive and up-to-date coverage of topics and fundamental theories underpinning measurement techniques and localization algorithms. A useful compilation for academicians, researchers, and practitioners, this Premier Reference Source contains relevant references and the latest studies emerging out of the wireless sensor network field.

Download or read book Localization in Wireless Networks written by Jessica Feng Sanford and published by Springer Science & Business Media. This book was released on 2012-05-03 with total page 207 pages. Available in PDF, EPUB and Kindle. Book excerpt: In a computational tour-de-force, this volume wipes away a host of problems related to location discovery in wireless ad-hoc sensor networks. WASNs have recognized potential in many applications that are location-dependent, yet are heavily constrained by factors such as cost and energy consumption. Their “ad-hoc” nature, with direct rather than mediated connections between a network of wireless devices, adds another layer of difficulty. Basing this work entirely on data-driven, coordinated algorithms, the author’s aim is to present location discovery techniques that are highly accurate—and which fit user criteria. The research deploys nonparametric statistical methods and relies on the concept of joint probability to construct error (including location error) models and environmental field models. It also addresses system issues such as the broadcast and scheduling of the beacon. Reporting an impressive accuracy gain of almost 17 percent, and organized in a clear, sequential manner, this book represents a stride forward in wireless localization.

Download or read book Localization in Wireless Sensor Networks written by Mark Terwilliger (Computer scientist) and published by . This book was released on 2006 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the proliferation of wireless sensor networks, providing location-aware technology and services to new applications have become important for developers. Localization is the problem of determining the positions of nodes in an ad hoc network. With the constrained resources of network sensors, providing robust localization services remains a fundamental research challenge facing the entire sensor network development community. The initial localization problem that we addressed was to design and develop a working system that could locate equipment, such as a laptop or video projector. Ferret, the localization system developed, uses two different ranging techniques to help locate an object to within one meter. Our next goal was to identify the locations of all nodes in a sensor network given the locations of a small subset of nodes. The system we developed, LESS or Localization using Evolution Strategies in Sensomets, provides substantial energy savings over existing techniques while providing comparable accuracy. We then introduce an efficient location discovery algorithm that bounds the localization error. Our algorithm, based on finding the smallest circle enclosing the intersection of n disks, runs in O(n ) time. We extend our work to the problem of finding the smallest disk that includes the set of points common to n disks and excluded from the interiors of m other disks. Many localization techniques say that a node can either be localized or it cannot. We present a location discovery algorithm that provides, for every node in the network, a position estimate, as well as an associated error bound and confidence level. We provide a versatile framework that allows users to perform localization queries based on the required accuracy and certainty. Ensuring coverage of a wireless sensor network is critical in many applications. Most schemes that analyze and implement coverage assume that sensor locations are known. For large sensor networks, errors occur when estimating node positions. Based on the errors that arise from the localization process, we present coverage algorithms that associate a confidence level with the coverage. We introduce a system that handles user coverage queries based on the coverage and certainty a situation requires.

Download or read book Robust and Secure Localization written by and published by . This book was released on 2009 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goals of this contract were to develop new solutions for robustness and security in wireless sensor networks with particular attention to localization. Our results are broad and fall into multiple areas. We developed new solutions for robust localization (section 2), secure localization (section 3), self-healing (section 4), anti-jamming (section 5) and robust wireless sensor network communication via coding (section 6). This report also includes a list of publications produced, general activities, names of graduate students supported, and several miscellaneous items.

Download or read book Location Localization and Localizability written by Yunhao Liu and published by Springer Nature. This book was released on with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Security in Sensor Networks written by Yang Xiao and published by CRC Press. This book was released on 2016-04-19 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sensor networks differ from traditional networks in many aspects including their limited energy, memory space, and computational capability. These differentiators create unique security vulnerabilities. Security in Sensor Networks covers all aspects of the subject, serving as an invaluable reference for researchers, educators, and practition

Download or read book Adls written by Ulya Sabeel and published by LAP Lambert Academic Publishing. This book was released on 2014-06-27 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: The increasing applications of wireless sensor networks in home, office, military, health, traffic, environment, industrial, etc., have exposed them to many harmful attacks especially on the identity of the nodes like spoofing. The traditional systems use complex cryptographic techniques, spatial signatures, RSSI values, etc. to deal with these spoofing attacks. They suffer from the disadvantages of overhead, high power consumption, bandwidth and other resources available along with high costs of implementation. In this work, a method named Attack Detection and Localization Scheme (ADLS) to detect and localize the multiple identity-based attacks like spoofing has been proposed. An improved algorithm for hashing has also been proposed that is named as Effective Hashing Technique (EHT).The main objective of this work is providing secure environment, free of intruders that masquerade the identity of legitimate nodes of a wireless sensor network especially deployed for the purpose of some real time crucial applications like Wireless Home Security, military, traffic etc.

Download or read book Probabilistic Region based Localization for Wireless Networks written by and published by . This book was released on 2005 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: Determining the physical location of wireless nodes is important to a wide variety of applications. In this paper, we propose a series of probabilistic region-based localization algorithms, including using static grids, segments of grids, and dynamic meshes. These algorithms provide a wide range of trade-off between accuracy and cost, making them suitable for different types of networks, such as sensor networks and mesh networks. Furthermore, we propose several techniques to extract and leverage additional information on location constraints, which is shown to significantly improve the localization accuracy and can be applied to other localization schemes. Finally we develop techniques to enhance robustness of localization, and show that the enhanced scheme can achieve high accuracy even in the presence of significant measurement errors.

Download or read book Robust and Efficient Localization Techniques for Cellular and Wireless Sensor Networks written by Haseebulla M. Khan and published by . This book was released on 2005 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Localization and Tracking in Wireless Networks written by Enyang Xu and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Given the increasing number of location-based applications in wireless networks, efficient solution to the problem of source localization and tracking has become more and more important. In this dissertation, we present our works on improving source localization and tracking in wireless networks. First we investigate localization algorithms for the time difference of arrival (TDOA) measurement model. Taking into account the colored measurement noise, we adopt a minmax principle to develop semidefinite relaxation algorithms that can be reliably solved using semidefinite programming with low complexity. The reduction of algorithm complexity is achieved through a simple but effective method for reference node selection among participating measurement nodes such that only a subset of selective time-differences of signal arrival are exploited. Our estimation methods are less sensitive to the source locations and can be used either as the final location estimate or as the initial point for traditional search algorithms. We also consider the more practical time of arrival (TOA) measurement model, in which the source start transmission time is unknown. We present two new methods that utilize semidefinite programming relaxation for direct source localization. We further address the issue of robust estimation given measurement errors and inaccuracy in the locations of receiving sensors. Our results demonstrate some potential advantages of source localization based on the direct TOA data over time-difference preprocessing. Next, we investigate the emitter source tracking problem in which a mobile tracking sensor and multiple anchored sensors cooperate to track and estimate a mobile source node locations. We propose a min-max approximation approach to estimate the location for tracking which can be efficiently solved via semidefinite programming relaxation, and apply a cubic function for mobile sensor navigation. We jointly estimate the location of the mobile sensor and the target to improve the tracking accuracy. To further improve the system performance, we propose a weighted tracking algorithm by using the measurement information more efficiently. Our results demonstrate that the proposed algorithm provides good tracking performance and can quickly direct the mobile sensor to follow the mobile target. Lastly, we consider the multi source localization problem. With nknown source node index of each received signal, we need to identify the source of each received signal as well as estimate the locations. The combinational nature of the receive signal mixing and ordering makes the problem very complicated. We propose two algorithms based on semidefinite relaxation, and provide corresponding refinement method for each algorithm. In addition, we consider the localization problem given ambiguous anchor node measurement. We propose to identify the ambiguous anchor nodes based on the estimated noise amplitude. After identifying the ambiguous anchor nodes, we can remove the incorrect TOA measurements and obtain more accurate location estimation. In summary, the works presented in this dissertation provide several effective approaches to localization and tracking in wireless networks under different measurement models. The proposed algorithms improve the performance with relatively low complexity. As the demands for location based service rise, our methods will have applications in real systems.

Download or read book Deep Learning Strategies for Security Enhancement in Wireless Sensor Networks written by Sagayam, K. Martin and published by IGI Global. This book was released on 2020-06-12 with total page 405 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wireless sensor networks have gained significant attention industrially and academically due to their wide range of uses in various fields. Because of their vast amount of applications, wireless sensor networks are vulnerable to a variety of security attacks. The protection of wireless sensor networks remains a challenge due to their resource-constrained nature, which is why researchers have begun applying several branches of artificial intelligence to advance the security of these networks. Research is needed on the development of security practices in wireless sensor networks by using smart technologies. Deep Learning Strategies for Security Enhancement in Wireless Sensor Networks provides emerging research exploring the theoretical and practical advancements of security protocols in wireless sensor networks using artificial intelligence-based techniques. Featuring coverage on a broad range of topics such as clustering protocols, intrusion detection, and energy harvesting, this book is ideally designed for researchers, developers, IT professionals, educators, policymakers, practitioners, scientists, theorists, engineers, academicians, and students seeking current research on integrating intelligent techniques into sensor networks for more reliable security practices.

Download or read book Providing Trustworthiness to the Operation of Location Based Services in Mobile Networks written by Shu Chen and published by . This book was released on 2010 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: The development of low-cost, ubiquitous, wireless systems is leading to a future where location will define the next generation of computing applications. Location Based services (LBS) use location information as the basis for providing enhanced services to a mobile user. The development of LBS is still in a relatively young stage and many questions and challenges must be addressed before a robust, secure and trustworthy LBS system can be successfully developed. This thesis takes the viewpoint that the eventual successful development of LBS can be accomplished, if the system is carefully designed and appropriate techniques are integrated. In particular, this thesis maps out three steps needed to achieve the security and trustworthiness requirement: first, identify the security policies that regulate the LBS application; second, use appropriate mechanisms to enforce the security policies; and third, put the whole system into a secure framework to prevent manipulation by unscrupulous entities participating in the service. In this thesis, we first capture the essential features of policies that regulate an LBS and formulate a security policy model. Then in order to enforce the security policies it is essential to get the accurate location information of the users. We propose to use the environmental data from embedded sensor networks to support localization and position verification, and prove its viability through experiments. Further, we present a key distribution based location verification scheme. Particularly in this part, we investigate the relationships between the transmitter deployment density, the number of keys received and the location verification accuracy. Next, we take the viewpoint that the risk of location spoofing can be bypassed when an LBS infrastructure does not rely on a localization procedure to enforce the security policies. We show how this is made possible in spatio-temporal access control applications when we use the key distribution method. Finally, we study a practical Mobile Location Based Service (MLS) and present an ultimate MLS framework and communication protocols that represent a culmination of the mechanisms we have examined in this thesis and support the primary theme of this thesis, which is that it is possible to design a secure location based service using an appropriate combination of tools.

Download or read book An Efficient Room based Indoor Localization Scheme for Wireless Sensor Networks written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mobile Entity Localization and Tracking in GPS less Environnments written by Richard Fuller and published by Springer. This book was released on 2009-09-29 with total page 275 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains the proceedings of the Second International Workshop on Mobile Entity Localization and Tracking in GPS-less Environments (MELT 2009), held in Orlando, Florida on September 30, 2009 in conjunction with the 11th International Conference on Ubiquitous Computing (Ubicomp 2009). MELT provides a forum for the presentation of state-of-the-art technologies in mobile localization and tracking and novel applications of location-based s- vices. MELT 2009 continued the success of the ?rst workshop in the series (MELT 2008), which was held is San Francisco, California on September 19, 2008 in conjunction with Mobicom. Location-awareness is a key component for achieving context-awareness. - cent years have witnessed an increasing trend towards location-based services and applications. In most cases, however, location information is limited by the accessibility to GPS, which is unavailable for indoor or underground fac- ities and unreliable in urban environments. Much research has been done, in both the sensor network community and the ubiquitous computing community, to provide techniques for localization and tracking in GPS-less environments. Novel applications based on ad-hoc localization and real-time tracking of - bile entities are growing as a result of these technologies. MELT brings together leaders from both the academic and industrial research communities to discuss challenging and open problems, to evaluate pros and cons of various approaches, to bridge the gap between theory and applications, and to envision new research opportunities.

Download or read book New Approach of Indoor and Outdoor Localization Systems written by Fouzia Elbahhar and published by BoD – Books on Demand. This book was released on 2012-10-10 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: Accurate determination of the mobile position constitutes the basis of many new applications. This book provides a detailed account of wireless systems for positioning, signal processing, radio localization techniques (Time Difference Of Arrival), performances evaluation, and localization applications. The first section is dedicated to Satellite systems for positioning like GPS, GNSS. The second section addresses the localization applications using the wireless sensor networks. Some techniques are introduced for localization systems, especially for indoor positioning, such as Ultra Wide Band (UWB), WIFI. The last section is dedicated to Coupled GPS and other sensors. Some results of simulations, implementation and tests are given to help readers grasp the presented techniques. This is an ideal book for students, PhD students, academics and engineers in the field of Communication, localization