Publications

SIFA on Nonce-based Authenticated Encryption: When Does It Fail? Application to Ascon
Viet Sang Nguyen, Vincent Grosso, Pierre-Louis Cayrel
FDTC 2025
Correlation Power Analysis on Ascon with Multi-bit Selection Function
Viet Sang Nguyen, Vincent Grosso, Pierre-Louis Cayrel
SECRYPT 2025
(Some errors in this paper were subsequently corrected in my PhD dissertation.)
Practical Persistent Fault Attacks on AES with Instruction Skip
Viet Sang Nguyen, Vincent Grosso, Pierre-Louis Cayrel
IACR CiC 2025
Practical Second-Order CPA Attack on Ascon with Proper Selection Function
Viet Sang Nguyen, Vincent Grosso, Pierre-Louis Cayrel
CASCADE 2025
OBSCURE: Versalite Software Obfuscation from a Lightweight Secure Element
Darius Mercadier, Viet Sang Nguyen, Matthieu Rivain, Aleksei Udovenko
IACR CHES 2025

Unpublished

Natural Resistance of Threshold Implementations to S(I)FA
Viet Sang Nguyen, Vincent Grosso, Pierre-Louis Cayrel

PhD

I completed my PhD at Université de Saint-Etienne under the supervison of Vincent Grosso and Pierre-Louis Cayrel. Entitled Physical Attacks against Symmetric Cryptography Standards, my thesis was conducted between January 2023 and October 2025. It contains my work on correlation power analysis attacks and fault attacks, focusing mainly on the new lightweight standard Ascon-AEAD and partly on AES.

Service

External Reviewer: EuroCrypt 2024, EuroCrypt 2025, TCHES 2026

Talks / Posters

14/09/2025: SIFA on Nonce-based Authenticated Encryption: When Does It Fail? Application to Ascon, at FDTC Kuala Lumpur, Malaysia
03/07/2025: SIFA on Nonce-based Authenticated Encryption: When Does It Fail? Application to Ascon, at SESAM seminar, in Laboratoire Hubert Curien, Saint-Étienne, France
11/06/2025: Correlation Power Analysis on Ascon with Multi-bit Selection Function, at SECRYPT, Bilbao, Spain
02/04/2025: Practical Second-Order CPA Attacks on Ascon with Proper Selection Function, at CASCADE, Saint-Etienne, France
01/10/2024: Attacks and Countermeasures in Persistent Fault Model, at JAIF, Rennes, France
18/06/2024: Resistance of Threshold Implementations against Statistical (Ineffective) Fault Attacks, at Journée de la Recherche, Saint-Étienne, France
06/06/2024: Differential and Correlation Power Analysis on Ascon, at SESAM seminar, in Laboratoire Hubert Curien, Saint-Étienne, France
06/06/2024: Persistent Fault Model: Generalization, Cryptanalysis and Countermeasures, at Journées C2, in Najac, France
22/06/2023: Linear Cryptanalysis and Countermeasures in Persistent Fault Model, at SESAM seminar, in Laboratoire Hubert Curien, Saint-Étienne, France

Teaching

2023 - 2024: Tutorials of C++ programming (33h), for undergraduate students at IUT Saint-Étienne
2023 - 2024: Tutorials of embedded programming on CodeWarrior (27h x3), for undergraduate students at IUT Saint-Étienne