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• W2108227430 abstract "In this thesis we propose several different primitives for secure localization and secure location verification. Some primitives are based on ultrasonic signals and some on radio. We discuss the advantages and disadvantages of both types and build secure localization and location verification protocols that take advantage of the physical characteristics of the transmitted signals. We first describe a technique for secure measurement of an upper bound on the physical distance between two radios. This technique is referred to as distance bounding. We describe the basic distance bounding protocol, the requirements and the known attacks. We describe the potential advantages and disadvantages of distance bounding protocols using ultrasonic communication and in which scenarios these attacks apply. We also describe radio (RF) distance bounding protocols, how they differ from ultrasonic in terms of security guaranties and what the challenges are. Our first protocol is a proximity based access control scheme for implantable medical devices (IMDs). Our scheme is based on ultrasonic distance bounding and enables an implanted medical device to grant access to its resources only to those devices that are in its close proximity. We demonstrate the feasibility of our approach through tests in an emulated patient environment. We show that, although implanted, IMDs can successfully verify the proximity of other devices with high accuracy. We propose a set of protocols that support our scheme, analyze their security in detail and discuss possible extensions. We make new observations about the security of implementations of ultrasonic distance bounding protocols. Finally, we discuss the integration of our scheme with existing IMD devices and with their existing security measures. We then move to radio (RF) distance bounding. One of the main obstacles for the wider deployment of RF distance bounding is the lack of platforms that implement these protocols. We address this problem and we build a prototype system that demonstrates that radio distance bounding protocols can be implemented to match the strict processing that these protocols require. Our system implements a prover that is able to receive, process and transmit signals in less than 1ns. The security guarantee that a distance bounding protocol built on top of this system therefore provides is that a malicious prover can, at most, pretend to be about 15cm closer to the verifier than it really is. To enable such fast processing at the prover, we use specially implemented concatenation as the prover’s processing function and show how it can be integrated into a distance bounding protocol. Finally, we show that functions such as XOR and the comparison function, that were" @default.
• W2108227430 created "2016-06-24" @default.
• W2108227430 creator A5035426350 @default.
• W2108227430 date "2011-01-01" @default.
• W2108227430 modified "2023-09-27" @default.
• W2108227430 title "Primitives For Secure Localization And Location Verification" @default.
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