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1,265 results on '"Sadeghi, Ahmad-Reza"'

103. Market-Driven Code Provisioning to Mobile Secure Hardware

Author

Dmitrienko, Alexandra, Heuser, Stephan, Nguyen, Thien Duc, da Silva Ramos, Marcos, Rein, Andre, Sadeghi, Ahmad-Reza, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Böhme, Rainer, editor, and Okamoto, Tatsuaki, editor

Published
2015
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104. Smart and Secure Cross-Device Apps for the Internet of Advanced Things

Author

Busold, Christoph, Heuser, Stephan, Rios, Jon, Sadeghi, Ahmad-Reza, Asokan, N., Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Böhme, Rainer, editor, and Okamoto, Tatsuaki, editor

Published
2015
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106. Intelligent Security: Is 'AI for Cybersecurity' a Blessing or a Curse (Dagstuhl Seminar 22412)

Author

Nele Mentens and Stjepan Picek and Ahmad-Reza Sadeghi, Mentens, Nele, Picek, Stjepan, Sadeghi, Ahmad-Reza, Nele Mentens and Stjepan Picek and Ahmad-Reza Sadeghi, Mentens, Nele, Picek, Stjepan, and Sadeghi, Ahmad-Reza

Abstract

This report documents the outcomes of Dagstuhl Seminar 22412 "Intelligent Security: Is "AI for Cybersecurity" a Blessing or a Curse". The seminar brought together 25 attendees from 10 countries (Canada, Croatia, Czech Republic, France, Germany, Netherlands, Singapore, Sweden, Switzerland, and the USA). There were 17 male and 8 female participants. Three participants were from the industry, and the rest were from academia. The gathered researchers are actively working in the domains of artificial intelligence and cybersecurity, emphasizing hardware security, fuzzing, physical security, and network security. The seminar aims to foster sharing experiences and best practices between various cybersecurity applications and understand how and when certain approaches are transferable. The first two days were devoted to 20-minute self-introductions by participants to achieve these goals. At the end of the second day, we made a list of topics that were decided to be the focus of the seminar and that will be discussed in the groups in the next few days. On the third and fourth days, the work was conducted in four discussion groups where at the end of each day, all participants gathered to report the results from the discussion groups and to align the goals. On the last day, we again worked in one group to summarize the findings and foster networking among participants. A hike was organized in the afternoon of the third day. The seminar was a success. The participants actively participated in the working groups and the discussions and went home with new ideas and collaborators. This report gathers the abstracts of the presented talks and the conclusions from the discussion groups, which we consider relevant contributions toward better interdisciplinary research on artificial intelligence and cybersecurity.

Published
2023
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107. FLAIRS: FPGA-Accelerated Inference-Resistant & Secure Federated Learning

Author

Li, H. (author), Rieger, Phillip (author), Zeitouni, Shaza (author), Picek, S. (author), Sadeghi, Ahmad Reza (author), Li, H. (author), Rieger, Phillip (author), Zeitouni, Shaza (author), Picek, S. (author), and Sadeghi, Ahmad Reza (author)

Abstract

Federated Learning (FL) has become very popular since it enables clients to train a joint model collaboratively without sharing their private data. However, FL has been shown to be susceptible to backdoor and inference attacks. While in the former, the adversary injects manipulated updates into the aggregation process; the latter leverages clients' local models to deduce their private data. Contemporary solutions to address the security concerns of FL are either impractical for real-world deployment due to high-performance overheads or are tailored towards addressing specific threats, for instance, privacy-preserving aggregation or backdoor defenses. Given these limitations, our research delves into the advantages of harnessing the FPGA-based computing paradigm to overcome performance bottlenecks of software-only solutions while mitigating backdoor and inference attacks. We utilize FPGA-based enclaves to address inference attacks during the aggregation process of FL. We adopt an advanced backdoor-aware aggregation algorithm on the FPGA to counter backdoor attacks. We implemented and evaluated our method on Xilinx VMK-180, yielding a significant speed-up of around 300 times on the IoT-Traffic dataset and more than 506 times on the CIFAR-10 dataset., Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public., Cyber Security

Published
2023
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111. Token-Based Cloud Computing : Secure Outsourcing of Data and Arbitrary Computations with Lower Latency

Author

Sadeghi, Ahmad-Reza, Schneider, Thomas, Winandy, Marcel, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Acquisti, Alessandro, editor, Smith, Sean W., editor, and Sadeghi, Ahmad-Reza, editor

Published
2010
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112. Anonymous Authentication with TLS and DAA

Author

Cesena, Emanuele, Löhr, Hans, Ramunno, Gianluca, Sadeghi, Ahmad-Reza, Vernizzi, Davide, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Acquisti, Alessandro, editor, Smith, Sean W., editor, and Sadeghi, Ahmad-Reza, editor

Published
2010
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113. Key Attestation from Trusted Execution Environments

Author

Kostiainen, Kari, Dmitrienko, Alexandra, Ekberg, Jan-Erik, Sadeghi, Ahmad-Reza, Asokan, N., Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Acquisti, Alessandro, editor, Smith, Sean W., editor, and Sadeghi, Ahmad-Reza, editor

Published
2010
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114. MoP-2-MoP – Mobile Private Microblogging

Author

Senftleben, Marius, Bucicoiu, Mihai, Tews, Erik, Armknecht, Frederik, Katzenbeisser, Stefan, Sadeghi, Ahmad-Reza, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Christin, Nicolas, editor, and Safavi-Naini, Reihaneh, editor

Published
2014
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115. On the (In)Security of Mobile Two-Factor Authentication

Author

Dmitrienko, Alexandra, Liebchen, Christopher, Rossow, Christian, Sadeghi, Ahmad-Reza, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Christin, Nicolas, editor, and Safavi-Naini, Reihaneh, editor

Published
2014
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116. Updaticator: Updating Billions of Devices by an Efficient, Scalable and Secure Software Update Distribution over Untrusted Cache-enabled Networks

Author

Ambrosin, Moreno, Busold, Christoph, Conti, Mauro, Sadeghi, Ahmad-Reza, Schunter, Matthias, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Kobsa, Alfred, Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Kutyłowski, Mirosław, editor, and Vaidya, Jaideep, editor

Published
2014
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118. Marionette: Manipulate Your Touchscreen via a Charging Cable

Author

Jiang, Yan, Ji, Xiaoyu, Wang, Kai, Yan, Chen, Mitev, Richard, Sadeghi, Ahmad-Reza, and Xu, Wenyuan

Abstract

The security of capacitive touchscreens is crucial since they have become the primary human-machine interface on smart devices. This paper presents Marionette, the first wired attack that creates ghost touches on capacitive touchscreens via charging cables and can manipulate the victim's devices with undesired consequences, e.g., establishing malicious Bluetooth connections. Our study provides a new threat vector against touchscreens that only requires connecting to a malicious charging port, which could be a public charging station, and is effective across various USB data blockers and power adapters. Despite the fact that smartphones employ abundant noise reduction and voltage management techniques, we manage to inject carefully crafted signals that can induce ghost touches within a chosen range. The underlying principle is to inject common-mode noises over the power line to avoid being effectively filtered yet affecting the touch measurement mechanism and synchronize the malicious noise with the screen measurement scanning cycles to place the ghost touches at target locations. We achieve three types of attacks, i.e., injection, alteration, and Denial-of-Service, and the evaluation of 12 commercial electronics, 6 power adapters, and 13 charging cables demonstrate the feasibility of Marionette.

Published
2024
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125. Intelligent Security: Is 'AI for Cybersecurity' a Blessing or a Curse (Dagstuhl Seminar 22412)

Author

Mentens, Nele, Picek, Stjepan, and Sadeghi, Ahmad-Reza

Subjects
Machine Learning, Security and privacy → Cryptography, Cybersecurity, Computing methodologies → Artificial intelligence, Artificial Intelligence, Computer systems organization → Real-time systems, Security and privacy → Intrusion/anomaly detection and malware mitigation, Computing methodologies → Machine learning, Security and privacy → Systems security, Hardware Security, Explainability, Security and privacy → Security in hardware
Abstract

This report documents the outcomes of Dagstuhl Seminar 22412 "Intelligent Security: Is "AI for Cybersecurity" a Blessing or a Curse". The seminar brought together 25 attendees from 10 countries (Canada, Croatia, Czech Republic, France, Germany, Netherlands, Singapore, Sweden, Switzerland, and the USA). There were 17 male and 8 female participants. Three participants were from the industry, and the rest were from academia. The gathered researchers are actively working in the domains of artificial intelligence and cybersecurity, emphasizing hardware security, fuzzing, physical security, and network security. The seminar aims to foster sharing experiences and best practices between various cybersecurity applications and understand how and when certain approaches are transferable. The first two days were devoted to 20-minute self-introductions by participants to achieve these goals. At the end of the second day, we made a list of topics that were decided to be the focus of the seminar and that will be discussed in the groups in the next few days. On the third and fourth days, the work was conducted in four discussion groups where at the end of each day, all participants gathered to report the results from the discussion groups and to align the goals. On the last day, we again worked in one group to summarize the findings and foster networking among participants. A hike was organized in the afternoon of the third day. The seminar was a success. The participants actively participated in the working groups and the discussions and went home with new ideas and collaborators. This report gathers the abstracts of the presented talks and the conclusions from the discussion groups, which we consider relevant contributions toward better interdisciplinary research on artificial intelligence and cybersecurity., DagRep, Volume 12, Issue 10, pages 106-128

Published
2023
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126. Advanced Topics

Author

Larsen, Per, Brunthaler, Stefan, Davi, Lucas, Sadeghi, Ahmad-Reza, Franz, Michael, Larsen, Per, Brunthaler, Stefan, Davi, Lucas, Sadeghi, Ahmad-Reza, and Franz, Michael

Published
2016
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128. Check My Profile: Leveraging Static Analysis for Fast and Accurate Detection of ROP Gadgets

Author

Stancill, Blaine, Snow, Kevin Z., Otterness, Nathan, Monrose, Fabian, Davi, Lucas, Sadeghi, Ahmad-Reza, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Stolfo, Salvatore J., editor, Stavrou, Angelos, editor, and Wright, Charles V., editor

Published
2013
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129. On the Effectiveness of the Remanence Decay Side-Channel to Clone Memory-Based PUFs

Author

Oren, Yossef, Sadeghi, Ahmad-Reza, Wachsmann, Christian, Hutchison, David, Editorial Board Member, Kanade, Takeo, Editorial Board Member, Kittler, Josef, Editorial Board Member, Kleinberg, Jon M., Editorial Board Member, Mattern, Friedemann, Editorial Board Member, Mitchell, John C., Editorial Board Member, Naor, Moni, Editorial Board Member, Pandu Rangan, C., Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Terzopoulos, Demetri, Editorial Board Member, Tygar, Doug, Editorial Board Member, Bertoni, Guido, editor, and Coron, Jean-Sébastien, editor

Published
2013
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130. CrowdShare: Secure Mobile Resource Sharing

Author

Asokan, N., Dmitrienko, Alexandra, Nagy, Marcin, Reshetova, Elena, Sadeghi, Ahmad-Reza, Schneider, Thomas, Stelle, Stanislaus, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Jacobson, Michael, editor, Locasto, Michael, editor, Mohassel, Payman, editor, and Safavi-Naini, Reihaneh, editor

Published
2013
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131. Client-Controlled Cryptography-as-a-Service in the Cloud

Author

Bleikertz, Sören, Bugiel, Sven, Ideler, Hugo, Nürnberger, Stefan, Sadeghi, Ahmad-Reza, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Jacobson, Michael, editor, Locasto, Michael, editor, Mohassel, Payman, editor, and Safavi-Naini, Reihaneh, editor

Published
2013
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132. Bringing Zero-Knowledge Proofs of Knowledge to Practice

Author

Bangerter, Endre, Barzan, Stefania, Krenn, Stephan, Sadeghi, Ahmad-Reza, Schneider, Thomas, Tsay, Joe-Kai, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Christianson, Bruce, editor, Malcolm, James A., editor, Matyáš, Vashek, editor, and Roe, Michael, editor

Published
2013
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133. The Silence of the LANs: Efficient Leakage Resilience for IPsec VPNs

Author

Sadeghi, Ahmad-Reza, Schulz, Steffen, Varadharajan, Vijay, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Foresti, Sara, editor, Yung, Moti, editor, and Martinelli, Fabio, editor

Published
2012
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134. PUFs: Myth, Fact or Busted? A Security Evaluation of Physically Unclonable Functions (PUFs) Cast in Silicon

Author

Katzenbeisser, Stefan, Kocabaş, Ünal, Rožić, Vladimir, Sadeghi, Ahmad-Reza, Verbauwhede, Ingrid, Wachsmann, Christian, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Prouff, Emmanuel, editor, and Schaumont, Patrick, editor

Published
2012
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135. Reverse Fuzzy Extractors: Enabling Lightweight Mutual Authentication for PUF-Enabled RFIDs

Author

Van Herrewege, Anthony, Katzenbeisser, Stefan, Maes, Roel, Peeters, Roel, Sadeghi, Ahmad-Reza, Verbauwhede, Ingrid, Wachsmann, Christian, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, and Keromytis, Angelos D., editor

Published
2012
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136. Softer Smartcards : Usable Cryptographic Tokens with Secure Execution

Author

Brasser, Franz Ferdinand, Bugiel, Sven, Filyanov, Atanas, Sadeghi, Ahmad-Reza, Schulz, Steffen, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, and Keromytis, Angelos D., editor

Published
2012
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137. CTL: A Platform-Independent Crypto Tools Library Based on Dataflow Programming Paradigm

Author

Ahmad, Junaid Jameel, Li, Shujun, Sadeghi, Ahmad-Reza, Schneider, Thomas, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, and Keromytis, Angelos D., editor

Published
2012
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138. Converse PUF-Based Authentication

Author

Kocabaş, Ünal, Peter, Andreas, Katzenbeisser, Stefan, Sadeghi, Ahmad-Reza, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Katzenbeisser, Stefan, editor, Weippl, Edgar, editor, Camp, L. Jean, editor, Volkamer, Melanie, editor, Reiter, Mike, editor, and Zhang, Xinwen, editor

Published
2012
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139. SmartTokens: Delegable Access Control with NFC-Enabled Smartphones

Author

Dmitrienko, Alexandra, Sadeghi, Ahmad-Reza, Tamrakar, Sandeep, Wachsmann, Christian, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Katzenbeisser, Stefan, editor, Weippl, Edgar, editor, Camp, L. Jean, editor, Volkamer, Melanie, editor, Reiter, Mike, editor, and Zhang, Xinwen, editor

Published
2012
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140. hPIN/hTAN: A Lightweight and Low-Cost E-Banking Solution against Untrusted Computers

Author

Li, Shujun, Sadeghi, Ahmad-Reza, Heisrath, Sören, Schmitz, Roland, Ahmad, Junaid Jameel, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, and Danezis, George, editor

Published
2012
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141. On Constructing Homomorphic Encryption Schemes from Coding Theory

Author

Armknecht, Frederik, Augot, Daniel, Perret, Ludovic, Sadeghi, Ahmad-Reza, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, and Chen, Liqun, editor

Published
2011
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142. TruWalletM: Secure Web Authentication on Mobile Platforms

Author

Bugiel, Sven, Dmitrienko, Alexandra, Kostiainen, Kari, Sadeghi, Ahmad-Reza, Winandy, Marcel, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Chen, Liqun, editor, and Yung, Moti, editor

Published
2011
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143. Twin Clouds: Secure Cloud Computing with Low Latency : (Full Version)

Author

Bugiel, Sven, Nürnberger, Stefan, Sadeghi, Ahmad-Reza, Schneider, Thomas, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, De Decker, Bart, editor, Lapon, Jorn, editor, Naessens, Vincent, editor, and Uhl, Andreas, editor

Published
2011
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144. Recyclable PUFs: Logically Reconfigurable PUFs

Author

Katzenbeisser, Stefan, Koçabas, Ünal, van der Leest, Vincent, Sadeghi, Ahmad-Reza, Schrijen, Geert-Jan, Schröder, Heike, Wachsmann, Christian, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Preneel, Bart, editor, and Takagi, Tsuyoshi, editor

Published
2011
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145. Trustworthy Clouds Underpinning the Future Internet

Author

Glott, Rüdiger, Husmann, Elmar, Sadeghi, Ahmad-Reza, Schunter, Matthias, Domingue, John, editor, Galis, Alex, editor, Gavras, Anastasius, editor, Zahariadis, Theodore, editor, Lambert, Dave, editor, Cleary, Frances, editor, Daras, Petros, editor, Krco, Srdjan, editor, Müller, Henning, editor, Li, Man-Sze, editor, Schaffers, Hans, editor, Lotz, Volkmar, editor, Alvarez, Federico, editor, Stiller, Burkhard, editor, Karnouskos, Stamatis, editor, Avessta, Susanna, editor, and Nilsson, Michael, editor

Published
2011
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146. Secure Set Intersection with Untrusted Hardware Tokens

Author

Fischlin, Marc, Pinkas, Benny, Sadeghi, Ahmad-Reza, Schneider, Thomas, Visconti, Ivan, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, and Kiayias, Aggelos, editor

Published
2011
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147. Privilege Escalation Attacks on Android

Author

Davi, Lucas, Dmitrienko, Alexandra, Sadeghi, Ahmad-Reza, Winandy, Marcel, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Burmester, Mike, editor, Tsudik, Gene, editor, Magliveras, Spyros, editor, and Ilić, Ivana, editor

Published
2011
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148. Lightweight Anonymous Authentication with TLS and DAA for Embedded Mobile Devices

Author

Wachsmann, Christian, Chen, Liqun, Dietrich, Kurt, Löhr, Hans, Sadeghi, Ahmad-Reza, Winter, Johannes, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Burmester, Mike, editor, Tsudik, Gene, editor, Magliveras, Spyros, editor, and Ilić, Ivana, editor

Published
2011
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149. Video Streaming Forensic – Content Identification with Traffic Snooping

Author

Liu, Yali, Sadeghi, Ahmad-Reza, Ghosal, Dipak, Mukherjee, Biswanath, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Burmester, Mike, editor, Tsudik, Gene, editor, Magliveras, Spyros, editor, and Ilić, Ivana, editor

Published
2011
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150. Close the Gate: Detecting Backdoored Models in Federated Learning based on Client-Side Deep Layer Output Analysis

Author

Rieger, Phillip, Krauß, Torsten, Miettinen, Markus, Dmitrienko, Alexandra, and Sadeghi, Ahmad-Reza

Subjects
FOS: Computer and information sciences, Computer Science - Machine Learning, Computer Science - Cryptography and Security, Cryptography and Security (cs.CR), Machine Learning (cs.LG)
Abstract

Federated Learning (FL) is a scheme for collaboratively training Deep Neural Networks (DNNs) with multiple data sources from different clients. Instead of sharing the data, each client trains the model locally, resulting in improved privacy. However, recently so-called targeted poisoning attacks have been proposed that allow individual clients to inject a backdoor into the trained model. Existing defenses against these backdoor attacks either rely on techniques like Differential Privacy to mitigate the backdoor, or analyze the weights of the individual models and apply outlier detection methods that restricts these defenses to certain data distributions. However, adding noise to the models' parameters or excluding benign outliers might also reduce the accuracy of the collaboratively trained model. Additionally, allowing the server to inspect the clients' models creates a privacy risk due to existing knowledge extraction methods. We propose CrowdGuard, a model filtering defense, that mitigates backdoor attacks by leveraging the clients' data to analyze the individual models before the aggregation. To prevent data leaks, the server sends the individual models to secure enclaves, running in client-located Trusted Execution Environments. To effectively distinguish benign and poisoned models, even if the data of different clients are not independently and identically distributed (non-IID), we introduce a novel metric called HLBIM to analyze the outputs of the DNN's hidden layers. We show that the applied significance-based detection algorithm combined can effectively detect poisoned models, even in non-IID scenarios. We show in our extensive evaluation that CrowdGuard can effectively mitigate targeted poisoning attacks and achieve in various scenarios a True-Positive-Rate of 100% and a True-Negative-Rate of 100%., Phillip Rieger and Torsten Krau{\ss} contributed equally to this contribution. 20 pages, 7 figures, 5 tables, 4 algorithms, 4 equations

Published
2022

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