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Wireless ad-hoc sensor networks have recently emerged as a premier research topic. They have great long term economic potential, ability to transform our lives, and pose many new system building challenges. Sensor networks also pose a number of new conceptual and optimization problems. Some, such as location, deployment, and tracking, are fundamental(More)
Wireless ad-hoc sensor networks will provide one of the missing connections between the Internet and the physical world. One of the fundamental problems in sensor networks is the calculation of coverage. Exposure is directly related to coverage in that it is a measure of how well an object, moving on an arbitrary path, can be observed by the sensor network(More)
ŠBECAUSE OF GLOBALIZATION of the semiconductor design and fabrication process, ICs are becoming increasingly vulnerable to malicious activities and alterations. These vulnerabilities have raised serious concerns regarding possible threats to military systems , financial infrastructures, transportation security, and household appliances. An adversary can(More)
Physically unclonable functions (PUFs) provide a basis for many security and digital rights management protocols. PUF-based security approaches have numerous comparative strengths with respect to traditional cryptography-based techniques, including resilience against physical and side channel attacks and suitability for lightweight protocols. However,(More)
As semiconductor manufacturing requires greater capital investments, the use of contract foundries has grown dramatically, increasing exposure to mask theft and unauthorized excess production. While only recently studied, IC piracy has now become a major challenge for the electronics and defense industries [6]. We propose a novel comprehensive technique to(More)
—System security has emerged as a premier design requirement. While there has been an enormous body of impressive work on testing integrated circuits (ICs) desiderata such as manufacturing correctness, delay, and power, there is no reported effort to systematically test IC security in hardware. Our goal is to provide an impetus for this line of research and(More)
—Wireless ad hoc sensor networks have recently emerged as a premier research topic. They have great long-term economic potential, ability to transform our lives, and pose many new system-building challenges. Sensor networks also pose a number of new conceptual and optimization problems. Here, we address one of the fundamental problems, namely, coverage.(More)
Wireless ad-hoc sensor networks have the potential to provide the missing interface between the physical world and the Internet, thus impacting a large number of users. This connection will enable computational treatments of the physical world in ways never before possible. In this far reaching scenario, quality of service can be expressed in terms of(More)
— On-line fault detection in sensor networks is of paramount importance due to the convergence of a variety of challenging technological, application, conceptual, and safety related factors. We introduce a taxonomy for classi£cation of faults in sensor networks and the £rst on-line model-based testing technique. The approach is generic in the sense that it(More)