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Processors nowadays are consistently equipped with debugging features to facilitate the program analysis. Specifically, the ARM debugging architecture involves a series of CoreSight components and debug registers to aid the system debugging, and a group of debug authentication signals are designed to restrict the usage of these components and registers. Meantime, the security of the debugging features is under-examined since it normally requires physical access to use these features in the traditional debugging model. However, ARM introduces a new debugging model that requires no physical access since ARMv7, which exacerbates our concern on the security of the debugging features. Inmore »
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With the proliferation of using smart and connected devices in the transportation domain, these systems inevitably face security threats from the real world. In this work, we analyze the security of the existing traffic signal systems and summarize the security implications exposed in our analysis. Our research shows that the deployed traffic signal systems can be easily manipulated with physical/remote access and are vulnerable to an array of real-world attacks such as a diversionary tactic. By setting up a standard traffic signal system locally in our lab and partnering with a municipality, we demonstrate that not only can traffic intersectionsmore »
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Abstract The prediction of reactor antineutrino spectra will play a crucial role as reactor experiments enter the precision era. The positron energy spectrum of 3.5 million antineutrino inverse beta decay reactions observed by the Daya Bay experiment, in combination with the fission rates of fissile isotopes in the reactor, is used to extract the positron energy spectra resulting from the fission of specific isotopes. This information can be used to produce a precise, data-based prediction of the antineutrino energy spectrum in other reactor antineutrino experiments with different fission fractions than Daya Bay. The positron energy spectra are unfolded to obtainmore »Free, publicly-accessible full text available July 1, 2022
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Free, publicly-accessible full text available March 1, 2023