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Performance evaluation of protocols resilient to physical attacks

Performance evaluation of protocols resilient to physical at...

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IEEE International Workshop on Hardware-Oriented Security and Trust (HOST)

作者： Sylvain Guilley Laurent Sauvage Jean-Luc Danger Nidhal Selmane Denis Real Institut TELECOM CNRS LTCI (UMR 5141) Département COMELEC TELECOM ParisTech Paris France DGA/Information Superiority Bruz France

Cryptographic implementations are vulnerable to physical attacks. Many countermeasures to resist them have been proposed in the past. However, they are all specific to a given attacker and allow to mitigate the risk only up to a certain level: improved attacks on those countermeasures can most of the time be devised. Therefore, a new trend consists in making cryptographic implementations resilient to physical attacks. This strategy makes it possible to prove the countermeasure against all possible types of attackers captured by a security model. Several resilient schemes for the protection of block ciphers exist. For a given security objective, they all permit to reach the same security level. Therefore, they differentiate only according to their efficiency. We first show that the genuine versions of these protocols achieve different I/O bandwidth and computational performance. Our second contribution is to improve those protocols thanks to a message blinding, assuming passive attacks require more than two traces to be successful. Then, we bring as a third contribution the fact that the improved versions of the protocols are very much alike, and that the difference between them depends only from the specific details of their instantiation.

关键词： Encryption Protocols Circuit faults Resilience Finite impulse response filter

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Performance evaluation of protocols resilient to physical attacks

Performance evaluation of protocols resilient to physical at...

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IEEE International Symposium on Hardware-Oriented Security and Trust

作者： Guilley, Sylvain Sauvage, Laurent Danger, Jean-Luc Selmane, Nidhal Real, Denis Département COMELEC TELECOM ParisTech Institut TELECOM 46 rue Barrault 75 634 Paris Cedex 13 France Secure-IC S.A.S. 37/39 rue Dareau 75 014 Paris France DGA Information Superiority La Roche Marguerite 35 174 Bruz France

ISBN: (纸本)9781457710575

关键词： Cryptography

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Vade Mecum on Side-Channels Attacks and Countermeasures for the Designer and the Evaluator

Vade Mecum on Side-Channels Attacks and Countermeasures for ...

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International Conference on Design & Technology of Integrated Systems in Nanoscale Era

作者： Sylvain Guilley Olivier Meynard Maxime Nassar Guillaume Duc Philippe Hoogvorst Houssem Maghrebi Aziz Elaabid Shivam Bhasin Youssef Souissi Nicolas Debande Laurent Sauvage Jean-Luc Danger Institut TELECOM/TELECOM ParisTech CNRS LTCI (UMR 5141) Departement COMELEC

ISBN: (纸本)9781612848990

Implementation-level attacks are nowadays well known and most designers of security embedded systems are aware of them. However, both the number of vulnerabilities and of protections have seriously grown since the first public reporting of these threats in 1996. It is thus difficult to assess the correct countermeasures association to cover all the possible attack paths. The goal of this paper is to give a clear picture of the possible adequation between actually risks and mitigation techniques. A specific focus is made on two protection techniques addressing primarily side-channel attacks: masking and hiding. For the first time, we provide with a way to estimate a tradeoff depending on the environmental conditions (amount of noise) and on the designer skills (ability to balance the design). This tradeoff is illustrated in a decision diagram, helpful for the security designer to justify choices and to account for the cost overhead.

关键词： Implementation-level attacks Side-channel attacks Hiding and masking Leakage metric Comparison of countermeasures Decision diagram for the designer

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Entropy-based power attack

Entropy-based power attack

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2010 IEEE International Symposium on Hardware-Oriented Security and Trust, HOST 2010

作者： Maghrebi, Houssem Guilley, Sylvain Danger, Jean-Luc Flament, Florent Département COMELEC Institut TELECOM TELECOM ParisTech. 46 rue Barrault 75 634 Paris Cedex France

ISBN: (纸本)9781424478101

Recent works have shown that the mutual information is a generic side-channel distinguisher, since it detects any kind of statistical dependency between leakage observations and hypotheses on the secret. In this study the mutual information analysis (MIA) is tested in a noisy real world design. It indeed appears to be a powerful approach to break unprotected implementations. However, the MIA fails when applied on a DES cryptoprocessor with masked substitution boxes (Sboxes) in ROM. Nevertheless, this masking implementation remains sensitive to Higher-Order Differential Power Analysis (HO-DPA). For instance, an attack based on a variance analysis clearly shows the vulnerabilities of a first order masking countermeasure. We propose a novel approach to information-theoretic HO attacks, called the Entropy-based Power Analysis (EPA). This new attack gives a greatest importance to highly informative partitions and in the meantime better distinguishes between the key hypotheses. A thorough empirical evaluation of the proposed attack confirms the overwhelming advantage of this new approach when compared with MIA. ©2010 IEEE.

关键词： Side channel attack

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UWB SIMO channel measurements for joint TOA and DOA estimation

UWB SIMO channel measurements for joint TOA and DOA estimati...

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作者： El Arja, Hajar Huyart, Bernard Begaud, Xavier Institut TELECOM TELECOM Paristech LTCI CNRS - UMR 5141 COMELEC Department 46 Rue Barrault 75013 Paris France

ISBN: (纸本)9782874870187

This paper presents an ultra-wideband (UWB) indoor channel sounding scheme with parallel RF chains based on five-port receivers and antenna array. Propagation measurements are used to study the direction of arrivals (DOAs) and time of arrivals (TOAs) across the European ultra-wideband frequency range of 6 to 8.5 GHz. Low-cost system and high-resolution estimation are obtained using a five-port receivers and the MUltiple SIgnal Classification (MUSIC) algorithm. This algorithm is associated with a Spatial Smoothing Pre-processing (SSP). Measurements are performed in line-of-sight (LOS) and no-line-of-sight (NLOS) radio propagation scenarios. A detailed description of the system and results evaluating the SIMO (Single Input Multiple Input) sounder are discussed in this paper. © 2010 EuMA.

关键词： Direction of arrival

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IMPROVEMENT OF POWER ANALYSIS ATTACKS USING KALMAN FILTER

IMPROVEMENT OF POWER ANALYSIS ATTACKS USING KALMAN FILTER

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IEEE International Conference on Acoustics, Speech, and Signal Processing

作者： Youssef Souissi Sylvain Guilley Jean-luc Danger Sami Mekki Guillaume Duc Institut Telecom/Telecom-ParisTech - Departement ComElec 46 rue Barrault 75634 Paris Cedex 13 France

ISBN: (纸本)9781424442959

Power analysis attacks are non intrusive and easily mounted. As a consequence, there is a growing interest in efficient implementation of these attacks against block cipher algorithms such as Data Encryption Standard (DES) and Advanced Encryption Standard (AES). In our paper we propose a new technique based on the Kalman theory. We show how this technique could be useful for the cryptographic domain by making power analysis attacks faster. Moreover we prove that the Kalman filter is more powerful than the High Order Statistics technique.

关键词： symmetrical encryption (AES DES) power analysis attacks (SPA DPA CPA) Kalman filtering High Order Statistics Kalman filtering DES gene Diethylstilbestrol Valproic Acid COPPER NO 142 Kalman filters power analysis Filters Data Encryption Standard block cipher algorithm

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Techniques for electromagnetic attacks enhancement

Techniques for electromagnetic attacks enhancement

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International Conference on Design and Technology of Integrated Systems in Nanoscale Era (DTIS)

作者： Youssef Souissi Jean-Luc Danger Sami Mekki Sylvain Guilley Maxime Nassar Département COMELEC Institut Telecom Telecom ParisTech Paris France

ISBN: (纸本)9781424463381;9781424463404

Electromagnetic attacks (EMA) pose real threats to embedded devices containing a secret information. Such attacks are of great concern since they are completely passive, low cost and easily mounted in practice. In this paper, we propose two innovative techniques to enhance electromagnetic attacks by reducing the number of measurements needed to succeed an attack on cryptographic implementations. The first method is based on the electromagnetic shielding theory which aims at decreasing the contribution of external noise sources. Whereas, the second provides an algorithmic solution to preprocess electromagnetic signals using the Kalman filtering (KF).

关键词： Electromagnetic shielding Cryptography Kalman filters Filtering Electromagnetic analysis Magnetic analysis Testing telecommunications Costs Electromagnetic measurements

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UWB SIMO channel measurements for joint TOA and DOA estimation

UWB SIMO channel measurements for joint TOA and DOA estimati...

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European Conference on Wireless Technology

作者： Hajar El Arja Bernard Huyart Xavier Begaud COMELEC Department Institut TELECOM-TELECOM Paristech LTCI CNRS-UMR Paris France

This paper presents an ultra-wideband (UWB) indoor channel sounding scheme with parallel RF chains based on five-port receivers and antenna array. Propagation measurements are used to study the direction of arrivals (DOAs) and time of arrivals (TOAs) across the European ultra-wideband frequency range of 6 to 8.5 GHz. Low-cost system and high-resolution estimation are obtained using a five-port receivers and the Multiple Signal Classification (MUSIC) algorithm. This algorithm is associated with a Spatial Smoothing Pre-processing (SSP). Measurements are performed in line-of-sight (LOS) and no-line-of-sight (NLOS) radio propagation scenarios. A detailed description of the system and results evaluating the SIMO (Single Input Multiple Input) sounder are discussed in this paper.

关键词： Antennas Receivers Antenna measurements Multiple signal classification Direction of arrival estimation Frequency measurement

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Entropy-based power attack

Entropy-based power attack

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IEEE International Workshop on Hardware-Oriented Security and Trust (HOST)

作者： Houssem Maghrebi Sylvain Guilley Jean-Luc Danger Florent Flament Département Comelec Institut Telecom Telecom ParisTech CNRS LTCI (UMR 5141) Paris France

ISBN: (纸本)9781424478118;9781424478101

关键词： Information analysis Analysis of variance Entropy Mutual information Testing Read only memory telecommunications Cryptography Field programmable gate arrays Algorithm design and analysis

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A Millimeter Wave Six-port Reflectometer for Active Load-Pull Characterization

A Millimeter Wave Six-port Reflectometer for Active Load-Pul...

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European Microwave Conference (EuMC 2010)

作者： Reda Mohellebi Eric Bergeault Ghalid Idir Abib Bernard Huyart Departement de Communication et d'electronique Institut TELECOM - TELECOM ParisTech - LTCI CNRS TELECOM & MANAGEMENT SudParis

ISBN: (纸本)9781424472321

This paper presents a millimeter wave six-port reflectometer (40-60 GHz) realized with waveguide components in order to accurately measure reflection coefficients and power levels in an active/passive source-pul/load-pull set-up. The structure of the six-port reflectometer and the calibration procedure are reported. The six-port accuracy is estimated by comparative measurements obtained with an heterodyne automatic network analyzer. Measurements show very good agreement and the maximum deviations when measuring reflection coefficient and power levels are found to be 0.07 and 0.6 mW, respectively.

关键词： millimeter wave Reflection coefficient load-pull waveguide components relative measurement maximum error power level

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