Nicolas T. Courtois

ORCID

Publication Activity (10 Years)

Years Active: 1998-2024
Publications (10 Years): 32

Top Venues

Cryptologia

IACR Cryptol. ePrint Arch.

CoRR

SECRYPT

Publications

Nicolas T. Courtois, Frédéric Amiel, Alexandre Bonnard de Fonvillars
On Maximum Size Simultaneous Linear Approximations in Ascon and Keccak and Related Translation and Differential Properties. IACR Cryptol. ePrint Arch. 2024 (2024)
Nicolas T. Courtois, Marek Grajek
On latin squares, invariant differentials, random permutations and historical Enigma rotors. Cryptologia 46 (5) (2022)
Nicolas T. Courtois
A nonlinear invariant attack on T-310 with the original Boolean function. Cryptologia 45 (2) (2021)
Nicolas T. Courtois, Matteo Abbondati, Hamy Ratoanina, Marek Grajek
On Closed-Cycle Loops and Applicability of Nonlinear Product Attacks to DES. IACR Cryptol. ePrint Arch. 2021 (2021)
Nicolas T. Courtois, Kacper T. Gradon, Klaus Schmeh
Crypto Currency Regulation and Law Enforcement Perspectives. CoRR (2021)
Nicolas T. Courtois
Invariant Hopping Attacks on Block Ciphers. CoRR (2020)
Nicolas T. Courtois, Marios Georgiou
Variable elimination strategies and construction of nonlinear polynomial invariant attacks on T-310. Cryptologia 44 (1) (2020)
Nicolas T. Courtois, Aidan Patrick, Matteo Abbondati
Construction of a polynomial invariant annihilation attack of degree 7 for T-310. Cryptologia 44 (4) (2020)
Nicolas T. Courtois, Jean-Jacques Quisquater
Can a Differential Attack Work for an Arbitrarily Large Number of Rounds? ICISC (2020)
Nicolas T. Courtois, Maria-Bristena Oprisanu, Klaus Schmeh
Linear cryptanalysis and block cipher design in East Germany in the 1970s. Cryptologia 43 (1) (2019)
Nicolas T. Courtois, Matteo Abbondati, Hamy Ratoanina, Marek Grajek
Systematic Construction of Nonlinear Product Attacks on Block Ciphers. ICISC (2019)
Nicolas T. Courtois, Marios Georgiou
Constructive Non-Linear Polynomial Cryptanalysis of a Historical Block Cipher. CoRR (2019)
Christopher D. Clack, Nicolas T. Courtois
Distributed Ledger Privacy: Ring Signatures, Möbius and CryptoNote. CoRR (2019)
Nicolas T. Courtois, Marios Georgiou, Matteo Scarlata
Slide attacks and LC-weak keys in T-310. Cryptologia 43 (3) (2019)
Nicolas T. Courtois, Aidan Patrick
Lack of Unique Factorization as a Tool in Block Cipher Cryptanalysis. CoRR (2019)
Nicolas T. Courtois
Structural Nonlinear Invariant Attacks on T-310: Attacking Arbitrary Boolean Functions. IACR Cryptol. ePrint Arch. 2018 (2018)
Nicolas T. Courtois, Jörg Drobick, Klaus Schmeh
Feistel ciphers in East Germany in the communist era. Cryptologia 42 (5) (2018)
Tooba Faisal, Nicolas T. Courtois, Antoaneta Serguieva
The Evolution of Embedding Metadata in Blockchain Transactions. CoRR (2018)
Nicolas T. Courtois
Decryption oracle slide attacks on T-310. Cryptologia 42 (3) (2018)
Nicolas T. Courtois, Maria-Bristena Oprisanu
Ciphertext-only attacks and weak long-term keys in T-310. Cryptologia 42 (4) (2018)
Nicolas T. Courtois
On the Existence of Non-Linear Invariants and Algebraic Polynomial Constructive Approach to Backdoors in Block Ciphers. IACR Cryptol. ePrint Arch. 2018 (2018)
Tooba Faisal, Nicolas T. Courtois, Antoaneta Serguieva
The Evolution of Embedding Metadata in Blockchain Transactions. IJCNN (2018)
Nicolas T. Courtois, Klaus Schmeh, Jörg Drobick, Jacques Patarin, Maria-Bristena Oprisanu, Matteo Scarlata, Om Bhallamudi
Cryptographic Security Analysis of T-310. IACR Cryptol. ePrint Arch. 2017 (2017)
Varnavas Papaioannou, Nicolas T. Courtois
On Feasibility and Performance of Rowhammmer Attack. ASHES@CCS (2017)
Nicolas T. Courtois, Rebekah Mercer
Stealth Address and Key Management Techniques in Blockchain Systems. ICISSP (2017)
Nicolas T. Courtois, Pouyan Sepehrdad, Guangyan Song, Iason Papapanagiotakis-Bousy
Predicting Outcomes of ElimLin Attack on Lightweight Block Cipher Simon. SECRYPT (2016)
Nicolas T. Courtois
An Improved Differential Attack on Full GOST. The New Codebreakers (2016)
Petr Susil, Pouyan Sepehrdad, Serge Vaudenay, Nicolas T. Courtois
On selection of samples in algebraic attacks and a new technique to find hidden low degree equations. Int. J. Inf. Sec. 15 (1) (2016)
Nicolas T. Courtois
High Saturation Complete Graph Approach for EC Point Decomposition and ECDL Problem. IACR Cryptol. ePrint Arch. 2016 (2016)
Nicolas T. Courtois
On Splitting a Point with Summation Polynomials in Binary Elliptic Curves. IACR Cryptol. ePrint Arch. 2016 (2016)
Nicolas T. Courtois
Two Philosophies for Solving Non-linear Equations in Algebraic Cryptanalysis. Mycrypt (2016)
Nicolas T. Courtois, Guangyan Song, Ryan Castellucci
Speed Optimizations in Bitcoin Key Recovery Attacks. IACR Cryptol. ePrint Arch. 2016 (2016)
Theodosis Mourouzis, Guangyan Song, Nicolas T. Courtois, Michalis Christofi
Advanced Differential Cryptanalysis of Reduced-Round SIMON64/128 Using Large-Round Statistical Distinguishers. IACR Cryptol. ePrint Arch. 2015 (2015)
Nicolas T. Courtois, Pinar Emirdag, Zhouyixing Wang
On Detection of Bitcoin Mining Redirection Attacks. ICISSP (2015)
Nicolas T. Courtois
On Multiple Symmetric Fixed Points in GOST. Cryptologia 39 (4) (2015)
Nicolas T. Courtois, Theodosis Mourouzis, Michal Misztal, Jean-Jacques Quisquater, Guangyan Song
Can GOST Be Made Secure Against Differential Cryptanalysis? Cryptologia 39 (2) (2015)
Nicolas T. Courtois
On The Longest Chain Rule and Programmed Self-Destruction of Crypto Currencies. CoRR (2014)
Nicolas T. Courtois
Cryptanalysis of Two GOST Variants with 128-Bit Keys. Cryptologia 38 (4) (2014)
Nicolas T. Courtois, Pinar Emirdag, Filippo Valsorda
Private Key Recovery Combination Attacks: On Extreme Fragility of Popular Bitcoin Key Management, Wallet and Cold Storage Solutions in Presence of Poor RNG Events. IACR Cryptol. ePrint Arch. 2014 (2014)
Nicolas T. Courtois, Marek Grajek, Rahul Naik
Optimizing SHA256 in Bitcoin Mining. CSS (2014)
Nicolas T. Courtois, Theodosis Mourouzis, Guangyan Song, Pouyan Sepehrdad, Petr Susil
Combined Algebraic and Truncated Differential Cryptanalysis on Reduced-round Simon. SECRYPT (2014)
Nicolas T. Courtois, Lear Bahack
On Subversive Miner Strategies and Block Withholding Attack in Bitcoin Digital Currency. CoRR (2014)
Nicolas T. Courtois, Pinar Emirdag, Daniel A. Nagy
Could Bitcoin Transactions Be 100x Faster?. SECRYPT (2014)
Nicolas T. Courtois
Low-Complexity Key Recovery Attacks on GOST Block Cipher. Cryptologia 37 (1) (2013)
Nicolas T. Courtois, Theodosis Mourouzis, Michal Misztal
Enhanced Truncated Differential Cryptanalysis of GOST. SECRYPT (2013)
Nicolas T. Courtois, Daniel Hulme, Kumail Hussain, Jerzy A. Gawinecki, Marek Grajek
On Bad Randomness and Cloning of Contactless Payment and Building Smart Cards. IEEE Symposium on Security and Privacy Workshops (2013)
Nicolas T. Courtois, Marek Grajek, Rahul Naik
The Unreasonable Fundamental Incertitudes Behind Bitcoin Mining. CoRR (2013)
Nicolas T. Courtois
Cryptanalysis of Grigoriev-Shpilrain Physical Asymmetric Scheme With Capacitors. IACR Cryptol. ePrint Arch. 2013 (2013)
Nicolas T. Courtois, Gregory V. Bard
Random Permutation Statistics and an Improved Slide-Determine Attack on KeeLoq. Cryptography and Security (2012)
Nicolas T. Courtois, Theodosis Mourouzis, Pho V. Le
Extension of de Weger's Attack on RSA with Large Public Keys. SECRYPT (2012)
Nicolas T. Courtois
Security Evaluation of GOST 28147-89 in View of International Standardisation. Cryptologia 36 (1) (2012)
Nicolas T. Courtois, Michal Misztal
Aggregated differentials and cryptanalysis of PP-1 and gost. Period. Math. Hung. 65 (2) (2012)
Nicolas T. Courtois, Pouyan Sepehrdad, Petr Susil, Serge Vaudenay
ElimLin Algorithm Revisited. FSE (2012)
Nicolas T. Courtois
Self-similarity Attacks on Block Ciphers and Application to KeeLoq. Cryptography and Security (2012)
Nicolas T. Courtois
An Improved Differential Attack on Full GOST. IACR Cryptol. ePrint Arch. 2012 (2012)
Gregory V. Bard, Shaun Van Ault, Nicolas T. Courtois
Statistics of Random Permutations and the Cryptanalysis of Periodic Block Ciphers. Cryptologia 36 (3) (2012)
Nicolas T. Courtois, Theodosis Mourouzis
Black-box Collision Attacks on the Compression Function of the GOST Hash Function. SECRYPT (2011)
Nicolas T. Courtois, Gregory V. Bard, Daniel Hulme
A New General-Purpose Method to Multiply 3x3 Matrices Using Only 23 Multiplications CoRR (2011)
Nicolas T. Courtois
Algebraic Complexity Reduction and Cryptanalysis of GOST. IACR Cryptol. ePrint Arch. 2011 (2011)
Nicolas T. Courtois
Security Evaluation of GOST 28147-89 In View Of International Standardisation. IACR Cryptol. ePrint Arch. 2011 (2011)
Ravi Jhawar, Philip Inglesant, Nicolas T. Courtois, Martina Angela Sasse
Make mine a quadruple: Strengthening the security of graphical one-time PIN authentication. NSS (2011)
Nicolas T. Courtois, Michal Misztal
First Differential Attack on Full 32-Round GOST. ICICS (2011)
Nicolas T. Courtois, Michal Misztal
Differential Cryptanalysis of GOST. IACR Cryptol. ePrint Arch. 2011 (2011)
Nicolas T. Courtois, Daniel Hulme, Theodosis Mourouzis
Solving Circuit Optimisation Problems in Cryptography and Cryptanalysis. IACR Cryptol. ePrint Arch. 2011 (2011)
Gregory V. Bard, Nicolas T. Courtois, Jorge Nakahara Jr., Pouyan Sepehrdad, Bingsheng Zhang
Algebraic, AIDA/Cube and Side Channel Analysis of KATAN Family of Block Ciphers. INDOCRYPT (2010)
Nicolas T. Courtois, Gregory V. Bard, Shaun Van Ault
Statistics of Random Permutations and the Cryptanalysis of Periodic Block Ciphers. IACR Cryptol. ePrint Arch. 2009 (2009)
Nicolas T. Courtois, Sean O'Neil, Jean-Jacques Quisquater
Practical Algebraic Attacks on the Hitag2 Stream Cipher. ISC (2009)
Nicolas T. Courtois
The Dark Side of Security by Obscurity and Cloning MiFare Classic Rail and Building Passes Anywhere, Anytime. IACR Cryptol. ePrint Arch. 2009 (2009)
Nicolas T. Courtois
The Dark Side of Security by Obscurity - and Cloning MiFare Classic Rail and Building Passes, Anywhere, Anytime. SECRYPT (2009)
Nicolas T. Courtois, Blandine Debraize
Algebraic Description and Simultaneous Linear Approximations of Addition in Snow 2.0.. ICICS (2008)
Nicolas T. Courtois, Karsten Nohl, Sean O'Neil
Algebraic Attacks on the Crypto-1 Stream Cipher in MiFare Classic and Oyster Cards. IACR Cryptol. ePrint Arch. 2008 (2008)
Nicolas T. Courtois, Gregory V. Bard, David A. Wagner
Algebraic and Slide Attacks on KeeLoq. FSE (2008)
Côme Berbain, Olivier Billet, Anne Canteaut, Nicolas T. Courtois, Henri Gilbert, Louis Goubin, Aline Gouget, Louis Granboulan, Cédric Lauradoux, Marine Minier, Thomas Pornin, Hervé Sibert
SOSEMANUK: a fast software-oriented stream cipher CoRR (2008)
Nicolas T. Courtois, Gregory V. Bard
Algebraic Cryptanalysis of the Data Encryption Standard. IMACC (2007)
Nicolas T. Courtois
How Fast can be Algebraic Attacks on Block Ciphers?. Symmetric Cryptography (2007)
Nicolas T. Courtois, Gregory V. Bard, David A. Wagner
Algebraic and Slide Attacks on KeeLoq. IACR Cryptol. ePrint Arch. 2007 (2007)
Nicolas T. Courtois
CTC2 and Fast Algebraic Attacks on Block Ciphers Revisited. IACR Cryptol. ePrint Arch. 2007 (2007)
Gregory V. Bard, Nicolas T. Courtois, Chris Jefferson
Efficient Methods for Conversion and Solution of Sparse Systems of Low-Degree Multivariate Polynomials over GF(2) via SAT-Solvers. IACR Cryptol. ePrint Arch. 2007 (2007)
Nicolas T. Courtois, Blandine Debraize
Specific S-Box Criteria in Algebraic Attacks on Block Ciphers with Several Known Plaintexts. WEWoRC (2007)
Nicolas T. Courtois
How Fast can be Algebraic Attacks on Block Ciphers ? IACR Cryptol. ePrint Arch. 2006 (2006)
Nicolas T. Courtois, Gregory V. Bard
Algebraic Cryptanalysis of the Data Encryption Standard. IACR Cryptol. ePrint Arch. 2006 (2006)
Nicolas T. Courtois, Blandine Debraize, Eric Garrido
On Exact Algebraic [Non-]Immunity of S-Boxes Based on Power Functions. ACISP (2006)
Nicolas T. Courtois, Louis Goubin
An Algebraic Masking Method to Protect AES Against Power Attacks. IACR Cryptol. ePrint Arch. 2005 (2005)
Nicolas T. Courtois
Feistel Schemes and Bi-Linear Cryptanalysis. IACR Cryptol. ePrint Arch. 2005 (2005)
Nicolas T. Courtois
Cryptanalysis of Sfinks. IACR Cryptol. ePrint Arch. 2005 (2005)
Nicolas T. Courtois, Blandine Debraize, Eric Garrido
On Exact Algebraic [Non-]Immunity of S-boxes Based on Power Functions. IACR Cryptol. ePrint Arch. 2005 (2005)
Nicolas T. Courtois, Louis Goubin
An Algebraic Masking Method to Protect AES Against Power Attacks. ICISC (2005)
Nicolas T. Courtois
The Best Differential Characteristics and Subtleties of the Biham-Shamir Attacks on DES. IACR Cryptol. ePrint Arch. 2005 (2005)
Nicolas T. Courtois
Cryptanalysis of Sfinks. ICISC (2005)
Aline Gouget, Hervé Sibert, Côme Berbain, Nicolas T. Courtois, Blandine Debraize, Chris J. Mitchell
Analysis of the Bit-Search Generator and Sequence Compression Techniques. FSE (2005)
Nicolas T. Courtois
Algebraic Attacks on Combiners with Memory and Several Outputs. ICISC (2004)
Nicolas T. Courtois
Feistel Schemes and Bi-linear Cryptanalysis. CRYPTO (2004)
Nicolas T. Courtois
The Inverse S-Box, Non-linear Polynomial Relations and Cryptanalysis of Block Ciphers. AES Conference (2004)
Nicolas T. Courtois
), Application to HFE Challenge 2 and Sflash-v2. Public Key Cryptography (2004)
Bo-Yin Yang, Jiun-Ming Chen, Nicolas T. Courtois
On Asymptotic Security Estimates in XL and Gröbner Bases-Related Algebraic Cryptanalysis. ICICS (2004)
Nicolas T. Courtois
Short Signatures, Provable Security, Generic Attacks and Computational Security of Multivariate Polynomial Schemes such as HFE, Quartz and Sflash. IACR Cryptol. ePrint Arch. 2004 (2004)
Nicolas T. Courtois
General Principles of Algebraic Attacks and New Design Criteria for Cipher Components. AES Conference (2004)
Nicolas T. Courtois, Jacques Patarin
About the XL Algorithm over GF(2). CT-RSA (2003)
Mehdi-Laurent Akkar, Nicolas T. Courtois, Romain Duteuil, Louis Goubin
A Fast and Secure Implementation of Sflash. Public Key Cryptography (2003)
Nicolas T. Courtois
Generic Attacks and the Security of Quartz. Public Key Cryptography (2003)

Nicolas T. Courtois.css-eqlu8i{font-size:small;padding-left:4px;}

Publication Activity (10 Years)

Top Topics

Top Venues

Nicolas T. Courtois