| TIAUSAS FRANCIS JEROME GAMBOA | D, 中間発表 | ユビキタスコンピューティングシステム | 安本 慶一, | 藤川 和利, | 諏訪 博彦, | 松田 裕貴 |
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title: Towards Secure and Privacy-aware Edge-based Middleware for Smart Mobility Applications
abstract: One area in which smart mobility systems can be used to make smarter cities is by providing a system that integrates realtime local traffic information with routing algorithms to provide efficient route planning services to the city's residents. However, the deployment and operation costs of such a system tend to dissuade widespread adoption. Approaches that combine edge servers with distributed local computation relax the issues somewhat, but more work has to be particularly on the privacy protection and performance issues of such a system. In this study, we examine an approach that combines distributed processing, location privacy protection schemes (LPPS), and private information retrieval (PIR) to design a distributed route planning system that is not reliant on cloud-based servers. In particular, it focuses on a system-level optimization mechanism that attempts to balance three different objectives: (1) improve the execution time of route planning queries, (2) guarantee the privacy protection level for both user inputs and result outputs, and (3) maintain a high quality for the route solutions. A distributed privacy-aware route planning problem which incorporates all three objectives is formulated and the input parameters with the most impact on the results are identified. Several heuristic algorithms for finding good input parameter values are also devised. Finally simulation experiments using synthesized high-granularity traffic data from Osaka City, Japan are used to evaluate the proposed approach. language of the presentation: English | ||||||
| HONG SEONGEON | M, 2回目発表 | 情報セキュリティ工学 | 林 優一 | 藤川 和利, | 安本 慶一, | Kim Youngwoo |
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title: Measurement and Analysis of noises on clock waveform caused by electromagnetic fault injection attack at board level
abstract: In this research, the impacts of fault injection attack at board level are measured and analyzed. The attack has been conducted with a magnetic probe to inject transient faults. In conventional studies, the attack target was a main integrated chip which processes encryption of data since it is closest from the magnetic probe and efficient to exploit fault injection attack to induce glitches on clock cycles. However, countermeasures at chip level have been being reinforced continuously to make attacks difficult. Thus, from the perspective of an attacker, targeting not only the main IC but other vulnerable components which may by-pass filters can be attempted. Therefore, In this study, the targets are components distant from the main IC such as a power delivery network, a memory, switches and buttons on the target board. In the performed experiment, clock waveforms are observed to estimate the noise level and glitches on clock cycles. Although there are capacitors on board and shielding on chips, large noises on the clock waveform are observed. Injecting faults in PDN showed the largest noises on the clock cycles because the power line is directly connected to the main IC. Interestingly, injection into other components, not directly related to the main IC, such as a memory and buttons also influenced noises on clock cycles. It is assumed that the noises made from near field coupling between PCB traces. It suggests that decoupling capacitors are not effective enough to prevent the coupling effect. This result is important since the result implies that the attack range can be expanded from the chip level to the board level. Thus, countermeasures for this issue is discussed and considered in the research. language of the presentation: English | ||||||
| 石長 篤人 | M, 2回目発表 | 情報基盤システム学 | 藤川 和利, | 安本 慶一, | 新井 イスマイル | |
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title:Proposal of Route Bus Arrival Time Prediction Model Using Historical Characteristics of Each Trip
abstract: Providing accurate arrival times is crucial for public transportation. In buses, it is difficult to accurately predict arrival times due to a wide range of factors such as traffic conditions and weather conditions. Previous studies have used travel time between bus stops and number of passengers to predict arrival time. However, all of them are based on routes with high frequency of operation and require information from other buses in the recent past.This method can be applied to the first bus and routes with long intervals between runs.Instead of information from other buses, the features of the trip are extracted to the maximum extent. language of the presentation: Japanese | ||||||
| 荒井 公寛 | M, 2回目発表 | 情報セキュリティ工学 | 林 優一, | 安本 慶一, | 藤川 和利, | 藤本 大介 |
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title:A Study of Electromagnetic Information Leakage from Multiple Synchronized Signals with Periodicity
abstract: The threat of information leakage through unintentional electromagnetic emanations from electronic devices has been reported. In an enviroment where leaking electromagnetic emanations of multiple sources are observed at the same time, it is difficult to obtain leaked signals from the equipment and the leakage threat is considered to be reduced. However, depending on the characteristics of the signals of the target device, the retrieval of information can be improved in such an environment. In the previous studies, the multiple sources of radiation are periodically asynchronous signals to improve the information retrievabillity. On the other hand, the information obtainability may be improved when the transfer function from the source to the measurement point is different, even if the sources are synchronized, which is difficult to obtain by the conventional method. In this study, we propose a method to improve the retrieval of the leaky signal from the equipment in the case of the multiple synchronized signals with periodicity and investigate the threat of electromagnetic information leakage. language of the presentation: Japanese | ||||||