From September 2025, I'm an Assistant Professor at Sorbonne Université (equivalent to a tenured Maître de Conférences in the French academic system). I will teach at the Engineering UFR
and will be a permanent research member of team ALMASTY of LIP6 (Computer Science Laboratory of Sorbonne Université).
My work focuses on advanced notions of public-key encryption and signature, as well as the broader foundations of cryptography. My recent publications are listed below. I dedicate my wholehearted gratitude to many collaborators and supervisors from whom I had a chance to learn throughout the years.
Privacy-Preserving Web Content Filtering using Attribute-Based
Encryption: A Comprehensive Study from Specification to Evaluation.
(2025) [Paper] With Adam Oumar Abdel-Rahman, Xavier Marchal, Olivier Levillain, Thibault Cholez, David Pointcheval.
Traitor Tracing in Multi-sender Setting. (TMCFE: Traceable Multi-client Functional Encryption)
Cryptology ePrint Archive, Report 2025/364 (2025) [Paper] With Xuan Thanh Do, Dang Truong Mac, Duong Hieu Phan, Quoc-Huy Vu.
Chosen-Ciphertext Security for Functional Encryption with Multiple Users: Definitions and Generic Concrete Constructions.
Cryptology ePrint Archive, Report 2025/025 (2025) [Paper]
(Old title: Chosen-Ciphertext Security for Inner Product FE: Mutli-Client and Multi-Input, Generically.)
Dynamic Decentralized Functional Encryption with Strong Security. Cryptology ePrint Archive, Report 2022/1532 (2022) [Paper] With David Pointcheval, Robert Schädlich. (Old title: Function-Hiding Dynamic Decentralized Functional Encryption for Inner Products.)
Journal papers
Decentralized Multi-Client Functional Encryption with Strong Security. IACR Communications in Cryptology1(2) (2024) [Paper] With David Pointcheval, Robert Schädlich.
Multi-Client Functional Encryption with Public Inputs and Strong Security. In: Public-Key Cryptography - IACR PKC 2025. Springer (2025) [Paper] With Duong Hieu Phan, David Pointcheval.
Dynamic Decentralized Functional Encryption: Generic Constructions with Strong Security. In: Public-Key Cryptography - IACR PKC 2025. Springer (2025) [Paper] With David Pointcheval, Robert Schädlich.
Pairing-Free Blind Signatures from Standard Assumptions in the ROM. In: Advances in Cryptology - IACR CRYPTO 2024. Springer (2024) [Paper] With Julia Kastner, Michael Reichle.
Optimal Security Notion for Decentralized Multi-Client Functional Encryption. In: Proceedings of the 21st International Conference on Applied Cryptography and Network Security (ACNS' 23). Springer (2023). [Paper] With Duong Hieu Phan, David Pointcheval.
Multi-Client Functional Encryption with Fine-Grained Access Control. In: Advances in Cryptology - IACR ASIACRYPT 2022. Springer (2022) [Paper] With Duong Hieu Phan, David Pointcheval.
Cumulatively All-Lossy-But-One Trapdoor Functions from Standard Assumptions. In: Proceedings of the 13th Conference on Security in Communication Networks (SCN' 22). Springer (2022) [Paper] With Benoît Libert, Alain Passelègue.
WI is Almost Enough: Contingent Payment All Over Again. In: Proceedings of the 2020 ACM SIGSAC Conference on Computer and Communications Security (CCS' 20). Association for Computing Machinery, New York, NY, USA (2020) [Paper][Tool] With Miguel Ambrona, Masayuki Abe.
Teaching
In the French academic system: L3 = 3rd and final year of Bachelor ; L2 = 2nd year of Bachelor ; M1 = 1st year of Master ; M2 = 2nd and final year of Master
My email: ky.nguyen [at] lip6.fr My postal address: Sorbonne Université - LIP6, 24-25, Office 410, 4 place Jussieu, 75252 Paris CEDEX 05 My public profiles:ORCID ; Google Scholar ; LinkedIn
