Centre National pour la Recherche Scientifique et Technique
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2-Year Postdoctoral Position in Cryptography and Symmetric-Key Cryptanalysis at CNRS/LORIA Centre national de la recherche scientifique in France
Degree Level
Postdoc
Field of study
Computer Science
Funding
2-year full-time temporary postdoctoral contract at CNRS/LORIA. The post is funded as a job-like research position; no stipend amount or tuition information is provided.
Deadline
Oct 8, 2026
Country
France
University
Centre National pour la Recherche Scientifique et Technique

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About this position
CNRS and the Lorrain Computer Science Laboratory (LORIA) in Nancy, France are advertising a 2-year postdoctoral position in cryptography, with a strong focus on symmetric-key cryptology and the analysis of modern encryption primitives.
The project centers on the design and cryptanalysis of block ciphers, stream ciphers, and hash functions. The advertised research direction highlights classical and advanced attack techniques such as linear cryptanalysis, differential cryptanalysis, differential-linear attacks, and boomerang attacks. The post also mentions interest in ARX schemes and “latin dance” ciphers such as Salsa and ChaCha.
The successful candidate will work on building new attacks and developing or extending models such as MILP, SAT, and CP, potentially integrating them into tools like TAGADA or CLAASP. This is a research-intensive position suited to candidates with strong analytical and programming skills.
Eligibility highlights: a PhD (or equivalent) in Computer Science or Mathematics, solid knowledge of symmetric-key cryptology, strong programming ability, and good scientific writing and communication skills. English proficiency is mandatory; French is listed as basic.
Location: Vandœuvre-lès-Nancy / Nancy, France. Contract: full-time temporary postdoctoral appointment for 2 years. Deadline: 2026-10-08.
Apply via the official CNRS job page or the Euraxess listing. Review the full advert and submit the required application documents before the deadline.
Funding details
2-year full-time temporary postdoctoral contract at CNRS/LORIA. The post is funded as a job-like research position; no stipend amount or tuition information is provided.
What's required
Applicant should have a PhD degree or equivalent in Computer Science or Mathematics, with good knowledge of symmetric-key cryptology. Good programming skills are required; C, Java, or Python/SageMath are a plus. Good writing and communication skills are requested, along with the ability to work independently and in a team. A good English level is mandatory; French level is listed as basic.
How to apply
Apply through the CNRS job portal or the Euraxess listing. Review the full advert and submit the application materials via the official website link provided in the post.
More information can be found here
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