Cryptography seminar

Practical infos

• Date

  The cryptography seminar of Rennes takes place every Friday at 1:45 p.m. Any participant can suggest a guest or a talk subject by sending an email to one of the scientific committee members.
• Location

  IRMAR - Université de Rennes - Campus Beaulieu Bat. 22, RDC, Rennes Amphi Lebesgue
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Next sessions

• Oblivious Transfer from Zero-Knowledge Proofs (or how to achieve round-optimal quantum Oblivious Transfer without structure)

  • June 06, 2025 (13:45 - 14:45)

  • IRMAR - Université de Rennes - Campus Beaulieu Bat. 22, RDC, Rennes - Amphi Lebesgue

  Speaker : Léo Colisson - Université Grenoble Alpes

  We provide a generic construction to turn any classical Zero-Knowledge (ZK) protocol into a composable oblivious transfer (OT) protocol (the protocol itself involving quantum interactions), mostly lifting the round-complexity properties and security guarantees (plain-model/statistical security/unstructured functions…) of the ZK protocol to the resulting OT protocol. Such a construction is unlikely[…]

  • Cryptography

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Presentation of the seminar

• About cryptography

  Scientists welcome the renewed interest and original insight that cryptography brings to their disciplines, as well as the intellectual challenges posed to them.

  Multidisciplinary par excellence, cryptography constitutes a point of contact between number theory, algebraic geometry, algorithms and computer science. It brings whole sections of the most fundamental mathematics into contact with applications of great practical importance. 

• The seminar leaders

  Leader :

  • Sylvain Duquesne ( University of Rennes) (leader) 

  Board :

  • Gwezenheg Robert (DGA)
  • André Schrottenloher (INRIA)  

• The scientific committee

  • Sylvain Duquesne (IRMAR)
  • Aurore Guillevic (IRISA)
  • Antonin Leroux (DGA-MI & IRMAR)
  • Pierre Loidreau (DGA-MI & IRMAR)
  • David Lubicz (DGA-MI & IRMAR)
  • Damien Marion (IRISA)
  • Jade Nardi (IRMAR)
  • Tuong-Huy Nguyen (DGA-MI & IRISA)
  • Gwezenheg Robert (DGA-MI & IRMAR)
  • André Schrottenloher (IRISA)
  • YiXin Shen (IRISA)

• The organizations involved

  • The General Directorate of Armament (DGA) : state body responsible for the development of cryptographic algorithms, which depends on the the Ministry of the Armed Forces.
  • Rennes Mathematical Research Institute (IRMAR) : mathematics research laboratory associating the National Center for Scientific Research (CNRS), the University of Rennes, the École Normale Supérieure de Cachan (ENS Cachan), the National Institute of Applied Sciences of Rennes (INSA Rennes) and the University of Rennes 2.
  • Institute for Research in Computer Science and Random Systems (IRISA): computer science research laboratory in Rennes.

  DGA, IRISA and IRMAR wish, by organizing this cooperative seminar, to crystallize the interest of different actors in the Rennes region around cryptography and, beyond current fashion, to encourage fruitful and scientific collaboration. quality.