Vahid Jahandideh

I’m a postdoctoral researcher in the Digital Security group at Radboud University (March 2026–present), working with Lejla Batina on post-quantum implementation security. I carried out my PhD research at Radboud from March 2022 to March 2026, supervised by Lejla Batina and Bart Mennink, focusing on random probing security and deterministic masking.

I’m also part of CESCALAB. Before my PhD, I was a researcher at Sharif University in Iran.

Research directions

• Post-quantum implementation security. I study side-channel attacks and countermeasures for Kyber/ML-KEM and HQC. My recent work combines power-trace experiments with algebraic and probabilistic analysis, including single-trace leakage in ML-KEM key generation and belief-propagation attacks on first-order masked Kyber.
• Random probing and noisy leakage. I develop methods for evaluating masking security and understanding how masked components compose. This work connects noisy leakage to concrete security estimates in the random probing model, with applications to AES.
• Deterministic masking. I design and analyze higher-order masking constructions that use randomness from the initial input sharing without consuming fresh randomness during execution. This includes work on secure composition and masked implementations of Ascon.

Thesis and résumé

My PhD defense will take place on 4 November 2026 at 14:30. Read my thesis (PDF).

Download my résumé (PDF).

Publications

• Vahid Jahandideh, Lejla Batina, Breaking First-Order Masked Kyber with Belief Propagation Alone. Cryptology ePrint Archive, Paper 2026/2448. Preprint. (2026)
• Vahid Jahandideh, Too Small to Hide: Single-Trace Key Recovery from ML-KEM Key Generation. Cryptology ePrint Archive, Paper 2026/2137. Accepted at ACTIVE 2026. DOI.
• Vahid Jahandideh, Bart Mennink, Lejla Batina, Leakage-Diagrams, Importance Sampling, and Composition in the Random Probing Model. Cryptology ePrint Archive, Paper 2026/444. Accepted for CHES 2027.
• Vahid Jahandideh, Bart Mennink, Lejla Batina, A Decomposition Approach for Evaluating Security of Masking, Advances in Cryptology – ASIACRYPT. (2025)
• Vahid Jahandideh, Bart Mennink, Lejla Batina, Probing Secure Composability Without Fresh Randomness: Theory and Application to Ascon, IACR Transactions on Cryptographic Hardware and Embedded Systems. (2025)
• Vahid Jahandideh, Jan Schoone, Lejla Batina, Clustering Approach for Higher-Order Deterministic Masking. Cryptology ePrint Archive, Paper 2025/273. Preprint. (2025)
• Vahid Jahandideh, Bart Mennink, Lejla Batina, An Algebraic Approach for Evaluating Random Probing Security With Application to AES, IACR Transactions on Cryptographic Hardware and Embedded Systems. (2024)
• Vahid Jahandideh, Léo Weissbart, Bart Mennink, Lejla Batina, A New Leakage Exploitation Framework and Its Application to Authenticated Encryption. NIST Lightweight Cryptography Workshop. (2023)
• Vahid Jahandideh, Concrete Evaluation of the Random Probing Security. IACR Cryptol. ePrint Arch. (2021)
• Vahid Jahandideh, Verification of the security in Boolean masked circuits. IACR Cryptol. ePrint Arch. (2021)