Current

The seminar is held on Tuesdays from 11 to 12 and is organised by Sabrina Kunzweiler and Maxime Bombar. Unless stated otherwise it takes place in room 2 of IMB. To get announcements, you can subscribe to the mailing list of the Bordeaux number theory seminars. Last minute changes may appear first on the IMB website.

• 2026-03-03
  11:00
  Salle 2
  Felicitas Hörmann (DLR)
  TBD
• 2026-03-10
  11:00
  Salle 2
  Xavier Caruso (CANARI)
  TBD
• 2026-03-24
  11:00
  Salle 2
  Mahshid Riahinia (ENS)
  Post-Quantum Public-Key Pseudorandom Correlation Functions for Oblivious Transfer
  Public-Key Pseudorandom Correlation Functions (PK-PCFs) are functions that generate pseudorandom correlated strings. These correlations can then be used to speed up secure computation protocols. Recent works have made significant progress building PK-PCFs using group-based assumptions, however, these assumptions do not hold up against quantum attackers. Much less is known about PK-PCFs in the post-quantum regime. In this talk, I will introduce an efficient lattice-based PK-PCF for oblivious transfer (OT) correlations. At the heart of our result lie several technical contributions that might be of independent interest. In particular, we introduce the first efficient lattice-based constrained pseudorandom functions for low-degree polynomials, from a new but natural “secret-power” variant of ring learning with errors (ring LWE) assumption.