Welcome to the CryptoLUX Wiki!

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Swiss NEMA cipher machine

CryptoLUX is a cryptology research group within Security and Trust interdisciplinary center (SnT) and the Computer Science and Communications (CSC) research unit of the University of Luxembourg. Professor Alex Biryukov is head of CryptoLUX and leads a team consisting of a permanent staff member (Johann Großschädl), several postdoctoral researchers, and about half a dozen Ph.D. students. The CryptoLUX group also forms part of the Laboratory of Algorithmics, Cryptology and Security (LACS). This wiki serves as an informal platform for the presentation of ongoing research projects and the dissemination of research outcome, ex. peer-reviewed publications, tools for cryptanalysis, source code of cryptographic software. We do our best to ensure the correctness of the information provided by this wiki, but, of course, we can not guarantee that the content is suitable for any particular purpose, especially if it covers work in progress.

Mission and Vision

The mission of the CryptoLUX group is to define, conduct, and disseminate leading-edge research in cryptology (and closely related fields), and to pass the knowledge gained from research on to students and industry partners. CryptoLUX is one of the few academic research teams worldwide that possesses expertise across the full spectrum of cryptology, ranging from theoretical foundations to implementation aspects and applications. Our mission and objectives are devised in accordance with the three main goals of the University of Luxembourg, which are teaching, research and knowledge transfer at the highest international level. Members of CryptoLUX collaborate with top research groups around the world. Our current research projects cover a wide variety of topics including algorithm design (block ciphers, hash functions, proofs of work), cryptanalysis, communication security and privacy enchancing technologies, financial technologies/blockchain, efficient implementations, side-channel attacks, and reverse engineering.

Emerging information and communication technologies, such as cloud computing or the Internet of things, pose a number of unique challenges related to the design and implementation of cryptographic primitives, which has initiated a large of body of research in these areas. Nonetheless, the number of cryptanalytic attacks (both traditional ones as well as side-channel attacks) is steadily increasing, and many of these attacks have led to devastating security breaches with fatal consequences. We envision CryptoLUX to be in the forefront of an international research community that tackles these challenges and develops innovative solutions for complex security problems based on a solid cryptographic foundation. To achieve this, we strive for a greater understanding of how cryptosystems get broken (or otherwise fail) in the real world, how they can be designed and implemented to better resist attacks, and how they should be used to build secure systems and networks.

We organized ESC 2017

ESC (Early Symmetric Crypto) is a Dagstuhl-like seminar series on symmetric cryptography that fosters collaboration instead of competition. ESC 2017 took place January 16–20, 2017 in Canach, Luxembourg. The program chairs of ESC 2017 were Alex Biryukov, Joan Daemen, Stefan Lucks, and Serge Vaudenay. More information can be found here.

Open Positions, Jobs

We are currently looking for three post-doctoral researchers (research associates) and a Ph.D. student to join the CryptoLux group in spring 2021. Further information about these positions can be found on the vacancies page.

News and Announcements

See here history of past events.

July 2015 Argon2 has won the PHC competition!!!

July 2018 Léo hash won the best Ph.D. thesis 2017 award (the Rolf Tarrach prize) of the University of Luxembourg (about 1 in a 100 competition). Thesis is here.

November 2018 Alex has given talk at Dagstuhl seminar on Blockchain Security at Scale.

March 2019 Christof gave talk at FSE/ToSC'2019 in Paris.

March 2019 We have submitted Sparkle for the Lightweight Authenticated Encryption competition run by NIST, US.

April 2019 Aleksei has defended his thesis on Symmetric Cryptography in Black and White-box Models.

April 2019 Daniel and Sergei gave talks about blockchain privacy at Cryblock'19.

May 2019 Alex and Aleksei have given talks at Whibox workshop in Darmstadt.

June 2019 Sergei gave talk at IEEE Security & Privacy (Europe) in Stockholm.

June 2019 Daniel gave talks at IEEE Communications and Network Security (CNS) in Washington D.C. and at Zcon1 in Split.

August 2019 Our team has won the WhibOx 2019 CTF competition in both design and analysis categories. More here.

September 2019 Alex is co-chairing Cryptocurrencies and Blockchain Technology (CBT) workshop at ESORICS'19.

November 2019 Luan will give talks at NIST workshop on lightweight crypto (US) and at CARDIS (Prague).

November 2019 Giuseppe and Daniel will give talk at ACM CCS in London on privacy and subliminal channels in ZK-SNARKs.

January 2020 Aleksei and Giuseppe co-authored a paper with KUL COSIC team on Cryptanalysis of the Legendre PRF to be presented at FSE2020. Qingju co-authored two papers on Division property at the same conference.

March 2020 Sergei and Alex co-authored a paper with colleagues from Norwegian University of Science and Technology on privacy of balances in the Lightning Network protocol. It got some news coverage.

May 2020 Qingju co-authored a paper on division property and improved cube attacks against Trivium and Grain-128AEAD at Eurocrypt 2020.

June 2020 Alzette: a 64-bit ARX-box related to our NIST LWC submission Sparkle was accepted to Crypto 2020.

Cryptolux Seminars.

How to reach us

We are in MNO building on Belval Campus, Esch-Belval, Luxembourg. About 25 mins car drive from the Luxembourg city.