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An Efficient Approach for Mitigating Covert Storage Channel Attacks in Virtual Machines by the Anti-Detection Criterion

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Journal of Computer Science & Technology 2019年第6期34卷 1351-1365页

作者： Chong Wang nasro min-allah Bei Guan Yu-Qi Lin Jing-Zheng Wu Yong-Ji Wang Institute of Software Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China College of Computer Science and Information Technology Imam Abdulrahman Bin Faisal UniversityDammam 1982 Saudi Arabia Block Chain Research Center Blue HelixGrand Cayman KY1-1100Cayman Islands

Covert channels have been an effective means for leaking confidential information across security domains and numerous studies are available on typical covert channels attacks and *** covert channel threat restriction solutions are based on the threat estimation criteria of covert channels such as capacity,accuracy,and short messages which are effective in evaluating the information transmission ability of a covert(storage)***,these criteria cannot comprehensively reflect the key factors in the communication process such as shared resources and synchronization and therefore are unable to evaluate covertness and complexity of increasingly upgraded covert storage *** a solution,the anti-detection criterion was introduced to eliminate these limitations of cover *** effective,most threat restriction techniques inevitably incur high performance overhead and hence become *** this work,we avoid such overheads and present a restriction algorithm based on the anti-detection criterion to restrict threats that are associated with covert storage channels in virtual machines while maintaining the resource efficiency of the *** evaluation shows that our proposed solution is able to counter covert storage channel attacks in an effective *** with Pump,a well-known traditional restriction algorithm used in practical systems,our solution significantly reduces the system overhead.

关键词： covert storage channel information security covert channel threat evaluation security and privacy protection

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Prepared of Olive Oil Doped SiO<sub>2</sub>via Sol-Gel Technique

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Advances in Materials Physics and Chemistry 2013年第5期3卷 239-243页

作者： Fawaz nasro Saiof Mohammed Alwan Hamza College of Science Baghdad University Baghdad Iraq Higher Institute for Laser Research Damascus University Damascus Syrian

Olive oil doped Nanosilica is successfully prepared by wet chemical synthesis method. Samples were analyzed by a variety of techniques, including X-ray diffraction, FTIR, absorption and emission spectrometers to report the capability of Sol-Gel technology on preparing of silica monolith as a host material for Olive oil, and investigate the effect of converting Olive oil to a solid state on its optical properties. Some absorption bands of Olive oil are disappearing from absorption spectrum of doped silica. Only single strong fluorescence peak was appearing in fluorescence spectrum of pure Olive oil at wavelength around 678 nm which attributed to chlorophylls, while fluorescence spectrum to doped sample shows two strong fluorescence peaks at the wavelength 681 nm and 585 nm which attributed to chlorophylls and Vitamin E respectively. The doping process enhances fluorescence activity of Olive oil through enhancing intensity of the fluorescence peak corresponding to Vitamin E. Absorption and fluorescence spectrums to doped silica sample give a good indication in direction of using Sol-Gel technique to prepare?for Olive oil doped SiO2 as an optical active material.

关键词： Sol-Gel SiO2 Olive Oil

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