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 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
