Bogdan Ursu

Hi! I am a researcher in cryptography at Consensys, where I work on efficient arguments of knowledge. In Spring 2023, I obtained my PhD in Computer Science from ETH Zurich, under the supervision of Prof. Dennis Hofheinz. During my PhD, my main research interests were at the intersection between zero-knowledge, functional encryption and indistinguishability obfuscation.

bogdanursuoffice AT gmail.com

• Doctorate in Computer Science - ETH Zurich.

• Parisian Master of Research in Computer Science - École Normale Supérieure Paris-Saclay.

• Bachelor of Computer Science - University Alexandru Ioan Cuza of Iasi.

Publications

• Romain Gay, Bogdan Ursu, On Instantiating Unleveled Fully-Homomorphic Signatures from Falsifiable Assumptions, PKC 2024

• Dennis Hofheinz, Kristina Hostakova, Roman Langrehr, Bogdan Ursu, On Structure-Preserving Cryptography and Lattices, PKC 2024

• Geoffroy Couteau, Shuichi Katsumata, Elahe Sadeghi, Bogdan Ursu, Statistical ZAPs from Group-Based Assumptions, TCC 2021

• Nico Döttling, Dominik Hartmann, Dennis Hofheinz, Eike Kiltz, Sven Schäge, Bogdan Ursu, On the Impossibility of Short Algebraic Signatures, TCC 2021

• Michel Abdalla, Dario Catalano, Romain Gay, Bogdan Ursu, Inner-Product Functional Encryption with Fine-Grained Access Control, Asiacrypt 2020

• Geoffroy Couteau, Shuichi Katsumata, Bogdan Ursu, Non-Interactive Zero-Knowledge in Pairing-Free Groups from Weaker Assumptions, Eurocrypt 2020

• Dennis Hofheinz, Bogdan Ursu, Dual-Mode NIZKs from Obfuscation, Asiacrypt 2019

• Michel Abdalla, Dario Catalano, Dario Fiore, Romain Gay, Bogdan Ursu, Multi-Input Functional Encryption for Inner Products: Function-Hiding Realizations and Constructions without Pairings, Crypto 2018

Preprints

• Alexandre Belling, Azam Soleimanian, Bogdan Ursu, Vortex: A List Polynomial Commitment and its Application to Arguments of Knowledge, Preprint 2024

Doctoral Thesis

• Bogdan Ursu, New Constructions of Round-Efficient Zero-Knowledge Proofs, ETH Zurich Online Library 2023