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 two permanent staff members (Johann Großschädl, Yann Le Corre), 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

Postdoc in Applied Cryptography

Description: The Cryptolux team of the University of Luxembourg is offering a 3 year Postdoc position in Cryptography. Candidates with proven publication record and interests in one or several of the following areas are welcome to apply:

- Design and analysis of symmetric cryptographic primitives

- Side-channel attacks on block ciphers and countermeasures

- Financial cryptography, crypto-currencies, blockchain tech

- Privacy enhancing technologies

- White-box cryptography

Your Profile

• Ph.D. degree in Cryptography, IT Security or related areas

• At least one research paper in top 10 crypto and IT security conferences (Crypto, Eurocrypt, Asiacrypt, FSE/Tosc, CHES, PETs, IEEE S&P, ACM CCS, Usenix, NDSS)

• Strong mathematical and algorithmic CS background

• Good skills in programming, scripting languages. Math tools a plus. Ethical hacking skills a plus.

• Commitment, team working and a critical mind

• Participation in competitions, Olympiads, CTFs - a big plus

• Fluent written and verbal communication skills in English are mandatory

We offer

You will work in an exciting international environment and will have the opportunity to participate in the development of a large IT security-focused research center (>250 people researching all aspects of IT security). The University offers highly competitive salaries (in the range of 5-6 Keuro per month net) and is an equal opportunity employer.

Applications, written in English, should be submitted by e-mail and should include:

• Curriculum Vitae (including your contact address, photo, work experience, publications)

• A research statement indicating your interests, main achievements, motivation (max 1 page),

Deadline for applications: January 15, 2018. Position is already available, so early submission is encouraged; applications will be processed upon arrival.

Contact: Prof. Alex Biryukov (e-mail: name dot family name (at) uni.lu)

PhD in Applied Cryptography, the PRIDE funding program

The successful candidate will join the CRYPTOLUX group led by Prof. Alex Biryukov. He or she will contribute to a research project on future directions in applied cryptography and and is expected to perform the following tasks:

• Shaping research directions and producing results in one or more of the following topics:

o Design and Cryptanalysis of lightweight block ciphers, authenticated encryption schemes

o Side-channel attacks on symmetric cryptosystems and countermeasures

o Design and security analysis of IoT and blockchain security protocols

o Strong whitebox-cryptography


• Providing guidance to M.Sc. students

• Disseminating results through scientific publications and talks at conferences

Your Profile

• M.Sc. degree in Computer Science, Applied Mathematics, Electrical Engineering, or a related field; GPA> 80%

• Strong mathematical and algorithmic CS background (complexity of algorithms; probability/statistics; discrete math; basic cryptography, algebra)

• Background in cryptography or information security or ethical hacking - a plus

• Good skills in programming, scripting languages . Math tools a plus.

• Commitment, team working and a critical mind

• Participation in competitions, Olympiads, CTFs - a big plus

• Fluent written and verbal communication skills in English are mandatory

We offer

Duration of Ph.D. is typically between 3-4 years. The University offers highly competitive salaries and is an equal opportunity employer. You will work in an exciting international environment and will have the opportunity to participate in the development of a newly created research center.

Application Applications, written in English, should be submitted online and should include:

• Curriculum Vitae (including your contact address, photo, work experience, publications)

• Transcript of B.Sc. and M.Sc. courses and grades

• A research statement indicating your interest, prior research (if any) and your motivation (max 1 page)

• Contact information for 2-3 referees


Deadline for applications: November 30, 2017. Early submission is encouraged; applications will be processed upon arrival.

Contact: Prof. Alex Biryukov (e-mail: name dot family name (at) uni.lu)


News and Announcements

See here history of past events.

July 2015 Argon2 has won the PHC competition!!!



October 2016 Léo will give talk about SPARX at the NIST Lightweight crypto workshop.

October 2016 Aleksei and his team have won the hack.lu CTF competition!

October 2016 Zcash cryptocurrency was launched with EquiHash as its proof-of-work.

December 2016 Léo and Vesselin gave talk about SPARX at ASIACRYPT'16 in Hanoi, Vietnam.

January 2017 Alex has organized ESC'17 where many of us gave talks.

March 2017 Léo gave talks about generic muliset-algebraic attacks, ASASA update and exponential S-boxes at the FSE in Tokyo, Japan.

April 2017 Sergei gave a talk about the Findel DSL at the 1st Workshop on Trusted Smart Contracts in Malta.

April 2017 Topics and Research Directions for Symmetric Cryptography

April 2017 Léo defended his thesis.

May 2017 Team CryptoLUX has won shared 1st place at the luxblockhackathon for an Asset Management+KYC+UP PoC.

July 2017 Daniel gave talk on SCA and Secure Network Protocols at ACNS, Japan.

September 2017 Aleksei and Alex have won the whitebox design challenge of ECRYPT and CHES2017. We also broke the three main competing designs.

November 2017 Aleksei gave talk on new masking formulas at CARDIS.

November 2017 Johann Großschädl gave talk about masking schemes with application to IoT at ISC'17 in Vietnam.

November 2017 Daniel defended his thesis (to appear here).

December 2017 Aleksei has won the professional track of the Student Olympiad in Cryptography.

Cryptolux Seminars.

How to reach us

We just moved to Belval Campus, Esch-Belval, Luxembourg. About 25 mins from Luxembourg city.

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