2 years post-doctoral position (M/F)

Job Description

Missions

This post-doctoral position research project lies in cryptography, which is the science developing algorithms to protect information and communications from malicious attackers. The objective is to focus on the design and cryptanalysis of symmetric key encryption algorithms and to propose various solutions for efficient and secure encryption.
In the domain of cryptography, a particular attention must be taken when looking at classical attacks against block ciphers such as linear or differential cryptanalysis. Those initial cryptanalyses have many possible extension and the aim of this post-doctoral position is to analyze some ciphers regarding those attacks. A particular attention will be taken when looking at differential-linear cryptanalysis and Boomerang attacks with the very recent results cited here. The differential-linear cryptanalysis is an old tool dating from 1994 but has been recently reconsidered with the introduction of a dedicated table and its finer analysis. The advances in the domain of Boomerang attacks follow many directions including probabilistiv extensions or dedicated computations of what is happening in the middle rounds. A particular attention would be to analyze, using those recent tools, the ARX schemes and particularly the latin dance schemes such as SALSA, ChaCha and so on.

Activity

The aim of this post-doctoral position research project is to build new attacks on block ciphers, stream ciphers or hash functions starting with studying linear and differential cryptanalysis. Then, a particular attention will be taken at differential-linear attacks or more generally at statistical or composite attacks. We will, after having fully understand the methods and the models (MILP, SAT or CP), develop models dedicated to other block ciphers or integrate the new models into a dedicated tool such as TAGADA, CLAASP or another tool.

Your Profil

Skills

The applicant should have a PhD degree (or equivalent) in Computer Science or Mathematics and good knowledge in symmetric key cryptology. Good programming skills are required, and skills in C, Java or Python/SageMath are a plus. Good writing and communication skills are requested, together with the ability to work independently as well as in a team.

A good English level is mandatory.

Your Work Environment

This post-doctoral position is linked with the part of the CARAMBA team working on symmetric key crypt

The post-doctoral position thesis will take place over 2 years at the Lorrain Computer Science Laboratory (LORIA) in Nancy (France).analysis.

Compensation and benefits

Compensation

3.021 euros bruts mensuels, ajustable selon expérience

Annual leave and RTT

44 jours

Remote Working practice and compensation

Pratique et indemnisation du TT

Transport

Prise en charge à 75% du coût et forfait mobilité durable jusqu’à 300€

About the offer

About the CNRS

The CNRS is a major player in fundamental research on a global scale. The CNRS is the only French organization active in all scientific fields. Its unique position as a multi-specialist allows it to bring together different disciplines to address the most important challenges of the contemporary world, in connection with the actors of change.

CNRS

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