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Research

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Research papers and projects:

• SAFE: Sponge API for field elements
  JPA, Dmitry Khovratovich, Bart Mennink, Porçu Quine
  Cryptology ePrint archive, report 2023/522
  See also the original post.
• Security review of Ethereum beacon clients
  JPA, Denis Kolegov, Evangelia Stathopoulou
• Security of BLS batch verification
  JPA, Quan Thoi Minh Nguyen, Antonio Sanso
  Ethresearch
• A survey of ECDSA threshold signing
  JPA, Adrian Hamelink, Omer Shlomovits
  Cryptology ePrint archive, report 2020/1390
• Attacking threshold wallets
  JPA, Omer Shlomovits
  Real World Crypto 2021
  Cryptology ePrint archive, report 2020/1052
• BLAKE3 – one function, fast everywhere
  Jack O'Connor, Samuel Neves, JPA, Zooko
  Real World Crypto 2020 (lightning talk)
• Too much crypto
  JPA
  Real World Crypto 2020
• Improving stateless hash-based signatures
  JPA, Guillaume Endignoux
  CT-RSA 2018
  Cryptology ePrint archive, report 2017/933
• Clarifying the subset-resilience problem
  JPA, Guillaume Endignoux
  Cryptology ePrint archive, report 2017/909
• SGX secure enclaves in practice: security and crypto review
  Black Hat
  Also get the slides, tools, and SGX application.
• Backdoors up my sleeve
  JPA
  International Journal of Proof-of-Concept or Get The Fuck Out (PoC||GTFO) 0x08, 2015
• NORX8 and NORX16: authenticated encryption for low-end systems
  JPA, Philipp Jovanovic, Samuel Neves
  TRUDEVICE 2015
• Analysis of NORX
  Philipp Jovanovic, Samuel Neves, JPA
  Third International Conference on Cryptology and Information Security in Latin America (Latincrypt 2014)
  Cryptology ePrint archive, report 2014/317
• NORX: parallel and scalable AEAD
  JPA, Philipp Jovanovic, Samuel Neves
  European Symposium on Research in Computer Security (ESORICS) 2014
• Malicious hashing: Eve's variant of SHA-1
  Ange Albertini, JPA, Maria Eichlseder, Florian Mendel, Martin Schläffer
  Selected Areas in Cryptography (SAC) 2014
  BSides Las Vegas
  DEFCON Skytalks
• NORX
  JPA, Philipp Jovanovic, Samuel Neves
  Candidate to the CAESAR competition, 2014
• A binary magic trick, Angecryption
  Ange Albertini JPA
  International Journal of Proof-of-Concept or Get The Fuck Out (PoC||GTFO) 0x03 , 2014
• BLAKE2: simpler, smaller, fast as MD5
  JPA, Samuel Neves, Zooko Wilcox-O'Hearn, Christian Winnerlein
  Applied Cryptography and Network Security (ACNS) 2013
  Cryptology ePrint archive, report 2013/322
• Quark: a lightweight hash (full version)
  JPA, Luca Henzen, Willi Meier, María Naya-Plasencia
  Journal of Cryptology, 26(2):313,339, 2013
• SipHash: a fast short-input PRF
  JPA, Daniel J. Bernstein
  DIAC -- Directions in Authenticated Ciphers, 2012
  13th International Conference on Cryptology in India (INDOCRYPT 2012)
  Cryptology ePrint archive, report 2012/351
• Heavy Quark for secure AEAD
  JPA, Simon Knellwolf, Willi Meier
  DIAC -- Directions in Authenticated Ciphers, 2012
• Implementing BLAKE with AVX, AVX2, and XOP
  Samuel Neves, JPA
  Cryptology ePrint archive, report 2012/275
  Extended version of the Third SHA-3 Conference paper
• BLAKE and 256-bit advanced vector extensions
  Samuel Neves, JPA
  Third SHA-3 Conference, 2012
• Practical attack on 8 rounds of the lightweight block cipher KLEIN
  JPA, María Naya-Plasencia, Markku-Juhani O. Saarinen
  12th International Conference on Cryptology in India (INDOCRYPT 2011)
• A note on a privacy-preserving distance bounding protocol
  JPA, Aikaterini Mitrokotsa, Pedro Peris-Lopez
  Thirteenth International Conference on Information and Communications Security (ICICS 2011)
• On the key schedule strength of PRESENT
  Julio Cesar Hernandez-Castro, Pedro Peris-Lopez, JPA
  4th SETOP International Workshop on Autonomous and Spontaneous Security (SETOP 2011)
• Eve's SHA3 candidate: malicious hashing
  JPA
  ECRYPT2 Hash Workshop 2011
• Tuple cryptanalysis of ARX with application to BLAKE and Skein
  JPA, Gaëtan Leurent, Willi Meier, Florian Mendel, Nicky Mouha, Raphael C.-W. Phan, Yu Sasaki, Petr Susil
  ECRYPT2 Hash Workshop 2011
• Mind your nonces: cryptanalysis of a privacy-preserving distance bounding protocol
  JPA, Aikaterini Mitrokotsa, Pedro Peris-Lopez
  Applied Cryptography and Network Security (ACNS) 2011, industrial track
• On the cryptanalysis of the hash function Fugue: partitioning and inside-out distinguishers
  JPA, Raphael C.-W. Phan
  Information Processing Letters, 111(11):512-515, 2011
• Exponential attacks on 6-round Luby-Rackoff and on 5-round Lai-Massey
  JPA
  Cryptology ePrint archive, report 2011/015
• Cryptanalysis of splay tree based encryption
  JPA
  Cryptology ePrint archive, report 2010/572
• VLSI characterization of the cryptographic hash function BLAKE
  Luca Henzen, JPA, Willi Meier, Raphael C.-W. Phan
  IEEE Transactions on Very Large Scale Integration Systems, 2010
• Distinguisher for full final round of Fugue-256
  JPA, Raphael C.-W. Phan
  Second SHA-3 Conference, 2010
• Quark: a lightweight hash
  JPA, Luca Henzen, Willi Meier, María Naya-Plasencia
  Cryptographic Hardware and Embedded Systems (CHES) 2010
  One of 3 papers from CHES 2010 invited to the Journal of Cryptology
• Distinguishers for the compression function and output transformation of Hamsi-256
  JPA, Emilia Käsper, Lars Ramkilde Knudsen, Krystian Matusiewicz, Rune Ødegaard, Thomas Peyrin, Martin Schläffer
  15th Australasian Conference on Information Security and Privacy (ACISP 2010)
  Cryptology ePrint archive, report 2010/091
• Practical distinguisher for the compression function of Blue Midnight Wish
  JPA
  Comment on the NIST Hash Competition, 2010
• Differential and invertibility properties of BLAKE
  JPA, Jian Guo, Simon Knellwolf, Krystian Matusiewicz, Willi Meier
  Fast Software Encryption (FSE) 2010
  Cryptology ePrint archive, report 2010/043
• Cryptanalysis of ESSENCE
  María Naya-Plasencia, Andrea Röck, JPA, Yann Laigle-Chapuy, Gaëtan Leurent, Willi Meier, Thomas Peyrin
  Fast Software Encryption (FSE) 2010
  Cryptology ePrint archive, report 2009/302
• Cryptanalysis of the ESSENCE family of hash functions
  Nicky Mouha, Gautham Sekar, JPA, Thomas Peyrin, Søren S. Thomsen, Meltem Sönmez Turan, Bart Preneel
  Inscrypt 2009
• Design and analysis of symmetric cryptographic algorithms
  JPA
  PhD thesis, EPFL, 2009
• Zero-sum distinguishers for reduced Keccak-f and for the core functions of Luffa and Hamsi
  JPA, Willi Meier
  Comment on the NIST Hash Competition, 2009
  Awarded the coffee machine prize for the most interesting cryptanalysis of Keccak by the Keccak Team
• Improved cryptanalysis of Skein
  JPA, Çağdaş Çalık, Willi Meier, Onur Özen, Raphael C.-W. Phan, Kerem Varıcı
  Asiacrypt 2009
  Cryptology ePrint archive, report 2009/438
• Efficient FPGA implementations of high-dimensional cube testers on the stream cipher Grain-128
  JPA, Itai Dinur, Luca Henzen, Willi Meier, Adi Shamir
  SHARCS 2009
  Cryptology ePrint archive, report 2009/218
• Cryptanalysis of Dynamic SHA(2)
  JPA, Orr Dunkelman, Sebastiaan Indesteege, Bart Preneel
  Selected Areas in Cryptography (SAC) 2009
  Cryptology ePrint archive, report 2009/184
• Cryptanalysis of the MCSSHA hash functions
  JPA, María Naya-Plasencia
  WEWoRC 2009
• First analysis of Keccak
  JPA, Dmitry Khovratovich
  Comment on the NIST Hash Competition, 2009
  Awarded the 25-beer prize for the best cryptanalysis of Keccak by the Keccak Team
• Security and privacy preservation in human-involved networks
  Craig Asher, JPA, Raphael C.-W. Phan
  iNetSec 2009
• More on Shabal's permutation
  JPA, Atefeh Mashatan, Willi Meier
  Comment on the NIST Hash Competition, 2009
• Inside the hypercube
  JPA, Eric Brier, Willi Meier, María Naya-Plasencia, Thomas Peyrin
  14th Australasian Conference on Information Security and Privacy (ACISP 2009)
  Cryptology ePrint archive, report 2008/486
  Awarded the €100 prize for the most interesting cryptanalysis of CubeHash by Daniel J. Bernstein
• Cryptanalysis of Vortex
  JPA, Orr Dunkelman, Florian Mendel, Christian Rechberger, Søren S. Thomsen
  Africacrypt 2009
• Cube testers and key recovery attacks on reduced-round MD6 and Trivium
  JPA, Itai Dinur, Willi Meier, Adi Shamir
  Fast Software Encryption (FSE) 2009
  Also appeared in Schloss Dagstuhl seminar proceedings
• Cryptanalysis of the ISDB scrambling algorithm (MULTI2)
  JPA, Jorge Nakahara Jr., Pouyan Sepehrdad
  Fast Software Encryption (FSE) 2009
• On the pseudorandomness of Shabal's keyed permutation
  JPA
  Comment on the NIST Hash Competition, 2009
• VLSI implementations of the cryptographic hash functions MD6 and ïrRUPT
  Luca Henzen, Flavio Carbognani, JPA, Sean O'Neil, Wolfgang Fichtner
  IEEE ISCAS 2009
• On hashing with tweakable ciphers
  Raphael C.-W. Phan, JPA
  IEEE ICC 2009
• Cryptanalysis of a hash function based on norm form equations
  JPA
  Cryptologia, 33(1):1-4, 2009
• A note on Vortex' security
  JPA, Orr Dunkelman
  Comment on the NIST Hash Competition, 2008
• Second preimages on MCSSHA-3
  JPA, María Naya-Plasencia
  Comment on the NIST Hash Competition, 2008
• SHA-3 proposal BLAKE
  JPA, Luca Henzen, Willi Meier, Raphael C.-W. Phan
  Candidate to the NIST Hash Competition, 2008
• Faster multicollisions
  JPA
  9th International Conference on Cryptology in India (INDOCRYPT 2008)
  Previously accepted to SECRYPT 2008, but withdrawn because unable to attend the conference
• Preimage attacks on 3-pass HAVAL and step-reduced MD5
  JPA, Willi Meier, Florian Mendel
  Selected Areas in Cryptography (SAC) 2008
  Cryptology ePrint archive, report 2008/183
• How (not) to efficiently dither blockcipher-based hash functions?
  JPA, Raphael C.-W. Phan
  Africacrypt 2008
• Next generation networks: human-aided and privacy-driven
  Raphael C.-W. Phan, JPA
  ITU-T "Innovations in NGN" Kaleidoscope Conference, 2008
• The hash function family LAKE
  JPA, Willi Meier, Raphael C.-W. Phan
  Fast Software Encryption (FSE) 2008
• New features of Latin dances: analysis of Salsa, Chacha, and Rumba
  JPA, Simon Fischer, Shahram Khazaei, Willi Meier, Christian Rechberger.
  Fast Software Encryption (FSE) 2008
  Cryptology ePrint archive, report 2007/472
  Awarded the $1000 prize for the most interesting cryptanalysis of Rumba20 by Daniel J. Bernstein
• Analysis of multivariate hash functions
  JPA, Willi Meier
  10th International Conference on Information Security and Cryptology (ICISC 2007)
• TCHo: a hardware-oriented trapdoor cipher
  JPA, Matthieu Finiasz, Willi Meier, Serge Vaudenay.
  12th Australasian Conference on Information Security and Privacy (ACISP 2007)
• Adaptive learning search, a new tool to help comprehending metaheuristics
  Johann Dréo, JPA, Patrick Siarry, Walid Tfaili.
  International Journal on Artificial Intelligence Tools, 16(3):483-505, 2007
• On a bias of Rabbit
  JPA
  The State of the Art of Stream Ciphers (SASC 2007)
  Awarded the $1000 prize for the best analysis of Rabbit by Cryptico
• On the pseudo-random generator ISAAC
  JPA
  Cryptology ePrint archive, report 2006/438
• A novel asymmetric scheme with stream cipher construction
  JPA
  Master's thesis, EPFL, Université Paris VII, 2006
• Conception d'un module de test de métaheuristiques
  JPA
  Undergraduate thesis, Université Paris XII, Université Cergy-Pontoise, 2005