Link to grant on funder's webpage
People involved
Highlights
Publications

Staff and students involved

• Péter Kutas.
• Charlotte Weitkamper.
• Andrea Basso.
  
• Boris Fouotsa.
  

Highlights

• Codesign of SQIsign, best paper award at ASIACRYPT 2019 and now a submission to NIST
• First torsion point attacks on SIDH
• Various new design and attacks in isogeny-based cryptography, published at the best cryptography venues
• Two workshops organized at the University of Birmingham
• Online summer school on isogeny-based cryptography (with Chloe Martindale), with nearly 600 participants registered
• Banff workshop on supersingular graphs in cryptography (with Victoria de Quehen, Kristin Lauter and Chloe Martindale)

Publications

A New Adaptive Attack on SIDH
Boris Fouotsa and Christophe Petit
CT-RSA 2022.

Cryptanalysis of an oblivious PRF from supersingular isogenies
Andrea Basso and Péter Kutas and Simon-Philipp Merz and Christophe Petit and Antonio Sanso
ASIACRYPT 2021.

SHealS and HealS: isogeny-based PKEs from a key validation method for SIDH
Boris Fouotsa and Christophe Petit
ASIACRYPT 2021.

Séta: Supersingular encryption from torsion attacks
Luca De Feo, Boris Fouotsa, Cyprien Delpech de Saint-Guilhem, Antonin Leroux, Péter Kutas, Christophe Petit, Javier Silva, Benjamin Wesolowski
ASIACRYPT 2021.

Improved torsion point attacks on SIDH variants
Victoria de Quehen, Péter Kutas, Chris Leonardi, Chloe Martindale, Lorenz Panny, Christophe Petit, Katherine E. Stange
CRYPTO 2021.

SimS: a simplification of SiGamal
Boris Fouotsa and Christophe Petit
PQ Crypto 2021.

One-way functions and malleability oracles: Hidden shift attacks on isogeny-based protocols
Péter Kutas, Simon-Philipp Merz, Christophe Petit, Charlotte Weitkämper
EUROCRYPT 2021.

Trapdoor DDH groups from pairings and isogenies
Péter Kutas, Christophe Petit, Javier Silva
SAC 2020.

On Index Calculus Algorithms for Subfield Curves
Steven Galbraith, Robert Granger, Simon-Philipp Merz, Christophe Petit
SAC 2020.

Secure Oblivious Transfer from Semi-Commutative Masking
Cyprien Delpech de Saint Guilhem, Emmanuela Orsini, Christophe Petit and Nigel Smart
CANS 2020. Paper

SQISign: Compact Post-Quantum signatures from Quaternions and Isogenies (BEST PAPER AWARD)
Luca De Feo, David Kohel, Antonin Leroux, Christophe Petit, Benjamin Wesolowski
ASIACRYPT 2020.

On Adaptive Attacks against Jao-Urbanik's Isogeny-Based Protocol
Andrea Basso, Péter Kutas, Simon-Philipp Merz, Christophe Petit, and Charlotte Weitkämper
Africacrypt 2020.
Proceedings. Preprint.

Another look at some isogeny hardness assumptions
Simon-Philipp Merz, Romy Minko, Christophe Petit
CT-RSA 2020.
Proceedings. Preprint.

Verifiable Delay Functions from Supersingular Isogenies and Pairings
Luca De Feo, Simon Masson, Christophe Petit and Antonio Sanso
ASIACRYPT 2019.
Proceedings.. Preprint..

Identification Protocols and Signature schemes based on supersingular isogeny problems (extended version of Asiacrypt 2017 best paper)
Steven Galbraith, Christophe Petit, Javier Silva Velon.
Journal of Cryptology, 33.
Eprint. Paper. ASIACRYPT 2017 version. Implementation by Benjamin Diamond.

Supersingular graphs in Cryptography
Kristin Lauter, Christophe Petit.
Surveys in Combinatorics 2019, LMS Lecture Note Series 456.