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655 results
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Seminar
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SoSysec
Differentially Private Linear Sketches: Efficient Implementations and Applications
Speaker : Fuheng Zhao (University of California Santa Barbara)
Linear sketches have been widely adopted to process fast data streams, and they can be used to accurately answer frequency estimation, approximate top K items, and summarize data distributions. When data are sensitive, it is desirable to provide privacy guarantees for linear sketches to preserve private information while delivering useful results with theoretical bounds. To address these[…] -
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Seminar
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SoSysec
Model Stealing Attacks Against Inductive Graph Neural Networks
Speaker : Yufei Han (INRIA)
Many real-world data come in the form of graphs. Graph neural networks (GNNs), a new family of machine learning (ML) models, have been proposed to fully leverage graph data to build powerful applications. In particular, the inductive GNNs, which can generalize to unseen data, become mainstream in this direction. Machine learning models have shown great potential in various tasks and have been[…] -
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Seminar
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SoSysec
Cybersecurity of industrial systems. Open problems and some ideas.
Speaker : Stéphane Mocanu (Inria Rhône-Alpes)
Research in cybersecurity of SCADA systems is a relatively recent field developed mainly into the last decade. Despite the manufacturers progress in hardening the security of device SCADA systems are still prone to severe vulnerabilities and specialized countermeasures are still incipient. This talk aims to present the open problems seen from the boundary between computer science and control[…] -
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Seminar
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SoSysec
Thwarting covert adversaries in FHE pipelines
Speaker : Sylvain Chatel (EPFL)
Fully Homomorphic Encryption (FHE) enables computations to be executed directly on encrypted data without decryption, thus it is becoming an auspicious solution to protect the confidentiality of sensitive data without impeding its usability for the purpose of analytics. While many practical systems rely on FHE to achieve strong privacy guarantees, their constructions only consider an honest-but[…] -
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Seminar
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SoSysec
Towards Security-Oriented Program analysis
Speaker : Sébastien Bardin (CEA LIST)
While digital security concerns increase, we face both a urging demand for more and more code-level security analysis and a shortage of security experts. Hence the need for techniques and tools able to automate part of these code-level security analyses. As source-level program analysis and formal methods for safety-critical applications have made tremendous progress in the past decades, it is[…] -
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Seminar
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SoSysec
L’empoisonnement de données semble-t-il un risque réaliste ?
Speaker : Adrien Chan-Hon-Tong (ONERA)
Les attaques adversaires ont rencontré un fort écho dans la communauté de vision par ordinateur. Pour autant, via ce type d’attaque, un hacker ne peut modifier le comportement de l’algorithme ciblé que localement. Inversement, l’empoisonnement de données est en mesure de modifier globalement le comportement de l’algorithme visé, et, il n’est pas forcément détectable par un opérateur notamment si[…] -