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Your search keyword '"Kizhvatov, Ilya"' showing total 22 results
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22 results on '"Kizhvatov, Ilya"'

1. MHC-II neoantigens shape tumour immunity and response to immunotherapy

Author

Alspach, Elise, Lussier, Danielle M., Miceli, Alexander P., Kizhvatov, Ilya, DuPage, Michel, Luoma, Adrienne M., and Meng, Wei

Subjects
Tumors -- Physiological aspects -- Care and treatment -- Patient outcomes, Major histocompatibility complex -- Physiological aspects, Immunotherapy -- Patient outcomes -- Methods, Environmental issues, Science and technology, Zoology and wildlife conservation
Abstract

The ability of the immune system to eliminate and shape the immunogenicity of tumours defines the process of cancer immunoediting.sup.1. Immunotherapies such as those that target immune checkpoint molecules can be used to augment immune-mediated elimination of tumours and have resulted in durable responses in patients with cancer that did not respond to previous treatments. However, only a subset of patients benefit from immunotherapy and more knowledge about what is required for successful treatment is needed.sup.2-4. Although the role of tumour neoantigen-specific CD8.sup.+ T cells in tumour rejection is well established.sup.5-9, the roles of other subsets of T cells have received less attention. Here we show that spontaneous and immunotherapy-induced anti-tumour responses require the activity of both tumour-antigen-specific CD8.sup.+ and CD4.sup.+ T cells, even in tumours that do not express major histocompatibility complex (MHC) class II molecules. In addition, the expression of MHC class II-restricted antigens by tumour cells is required at the site of successful rejection, indicating that activation of CD4.sup.+ T cells must also occur in the tumour microenvironment. These findings suggest that MHC class II-restricted neoantigens have a key function in the anti-tumour response that is nonoverlapping with that of MHC class I-restricted neoantigens and therefore needs to be considered when identifying patients who will most benefit from immunotherapy. In a mouse tumour model, immunotherapy-induced rejection of tumour cells requires presentation of both MHC class I and MHC class II antigens, which activate CD4.sup.+ and CD8.sup.+ T cells, respectively., Author(s): Elise Alspach [sup.1] [sup.2] , Danielle M. Lussier [sup.1] [sup.2] , Alexander P. Miceli [sup.1] [sup.2] , Ilya Kizhvatov [sup.1] , Michel DuPage [sup.3] [sup.8] , Adrienne M. Luoma [...]

Published
2019
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2. Fast and Memory-Efficient Key Recovery in Side-Channel Attacks

Author

Bogdanov, Andrey, Kizhvatov, Ilya, Manzoor, Kamran, Tischhauser, Elmar, Witteman, Marc, 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, Dunkelman, Orr, editor, and Keliher, Liam, editor

Published
2016
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3. Cryptanalysis of the Atmel Cipher in SecureMemory, CryptoMemory and CryptoRF

Author

Biryukov, Alex, Kizhvatov, Ilya, Zhang, Bin, 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, Lopez, Javier, editor, and Tsudik, Gene, editor

Published
2011
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4. Improved Trace-Driven Cache-Collision Attacks against Embedded AES Implementations

Author

Gallais, Jean-François, Kizhvatov, Ilya, Tunstall, Michael, 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, Chung, Yongwha, editor, and Yung, Moti, editor

Published
2011
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5. Performance and Security Aspects of Client-Side SSL/TLS Processing on Mobile Devices

Author

Großschädl, Johann, Kizhvatov, Ilya, 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, Heng, Swee-Huay, editor, Wright, Rebecca N., editor, and Goi, Bok-Min, editor

Published
2010
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6. Analysis and Improvement of the Random Delay Countermeasure of CHES 2009

Author

Coron, Jean-Sébastien, Kizhvatov, Ilya, 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, Mangard, Stefan, editor, and Standaert, François-Xavier, editor

Published
2010
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7. Combined Implementation Attack Resistant Exponentiation

Author

Schmidt, Jörn-Marc, Tunstall, Michael, Avanzi, Roberto, Kizhvatov, Ilya, Kasper, Timo, Oswald, David, 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, Abdalla, Michel, editor, and Barreto, Paulo S. L. M., editor

Published
2010
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8. An Efficient Method for Random Delay Generation in Embedded Software

Author

Coron, Jean-Sébastien, Kizhvatov, Ilya, 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, Clavier, Christophe, editor, and Gaj, Kris, editor

Published
2009
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9. Fault Attacks on RSA Signatures with Partially Unknown Messages

Author

Coron, Jean-Sébastien, Joux, Antoine, Kizhvatov, Ilya, Naccache, David, Paillier, Pascal, 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, Clavier, Christophe, editor, and Gaj, Kris, editor

Published
2009
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10. Algebraic Methods in Side-Channel Collision Attacks and Practical Collision Detection

Author

Bogdanov, Andrey, Kizhvatov, Ilya, Pyshkin, Andrey, 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, Chowdhury, Dipanwita Roy, editor, Rijmen, Vincent, editor, and Das, Abhijit, editor

Published
2008
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17. Physical Security of Cryptographic Algorithm Implementations

Author

Kizhvatov, Ilya and Gerkrath, Jörg [superviser]

Subjects
Computer science [C05] [Engineering, computing & technology], physical attacks, side-channel attacks, cryptographic implementations countermeasures, Sciences informatiques [C05] [Ingénierie, informatique & technologie], cryptography fault attacks
Abstract

This thesis deals with physical attacks on implementations of cryptographic algorithms and countermeasures against these attacks. Physical attacks exploit properties of an implementation to recover secret cryptographic keys. Particularly vulnerable to physical attacks are embedded devices. In the area of side-channel analysis, this thesis addresses attacks that exploit observations of power consumption or electromagnetic leakage of the device and target symmetric cryptographic algorithms. First, this work proposes a new combination of two well-known attacks that is more efficient than each of the attacks individually. Second, this work studies attacks exploiting leakage induced by microprocessor cache mechanism, suggesting an algorithm that can recover the secret key in the presence of uncertainties in cache event detection from side-channel acquisitions. Third, practical side-channel attacks are discovered against the AES engine of the AVR XMEGA, a recent versatile microcontroller. In the area of fault analysis, this thesis extends existing attacks against the RSA digital signature algorithm implemented with the Chinese remainder theorem to a setting where parts of the signed message are unknown to the attacker. The new attacks are applicable in particular to several widely used standards in modern smart card applications. In the area of countermeasures, this work proposes a new algorithm for random delay generation in embedded software. The new algorithm is more efficient than the previously suggested algorithms since it introduces more uncertainty for the attacker with less performance overhead. The results presented in this thesis are practically validated in experiments with general-purpose 8-bit AVR and 32-bit ARM microcontrollers that are used in many embedded devices.

Published
2011

18. Analysis of the split mask countermeasure for embedded systems

Author

Coron, Jean-Sébastien, Kizhvatov, Ilya, Coron, Jean-Sébastien, and Kizhvatov, Ilya

Abstract

We analyze a countermeasure against differential power and electromagnetic attacks that was recently introduced under the name of split mask. We show a general weakness of the split mask countermeasure that makes standard DPA attacks with a full key recovery applicable to masked AES and DES implementations. Complexity of the attacks is the same as for unmasked implementations. We implement the most efficient attack on an 8-bit AVR microcontroller. We also show that the strengthened variant of the countermeasure is susceptible to a second order DPA attack independently of the number of used mask tables.

Published
2009

22. Performance and Security Aspects of Client-Side SSL/TLS Processing on Mobile Devices.

Author

Groβschädl, Johann and Kizhvatov, Ilya

Abstract

The SSL/TLS protocol is the de-facto standard for secure Internet communications, and supported by virtually all modern e-mail clients and Web browsers. With more and more PDAs and cell phones providing wireless e-mail and Web access, there is an increasing demand for establishing secure SSL/TLS connections on devices that are relatively constrained in terms of computational resources. In addition, the cryptographic primitives executed on the client side need to be protected against side-channel analysis since, for example, an attacker may be able to monitor electromagnetic emanations from a mobile device. Using an RSA-based cipher suite has the advantage that all modular exponentiations on the client side are carried out with public exponents, which is uncritical regarding performance and side-channel leakage. However, the current migration to AES-equivalent security levels makes a good case for using an Elliptic Curve Cryptography (ECC)-based cipher suite. We show in this paper that, for high security levels, ECC-based cipher suites outperform their RSA counterparts on the client side, even though they require the integration of diverse countermeasures against side-channel attacks. Furthermore, we propose a new countermeasure to protect the symmetric encryption of messages (i.e. ˵bulk data″) against Differential Power Analysis (DPA) attacks. This new countermeasure, which we call Inter-Block Shuffling (IBS), is based on an ˵interleaved″ encryption of a number of data blocks using a non-feedback mode of operation (such as counter mode), and randomizes the order in which the individual rounds of the individual blocks are executed. Our experimental results indicate that IBS is a viable countermeasure as it provides good DPA-protection at the expense of a slight degradation in performance. [ABSTRACT FROM AUTHOR]

Published
2010
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