About Me
- I’m a researcher at NTT Social Informatics Laboratories (formerly NTT Secure Platform Laboratories), NTT Corporation, Japan.
- I joined NTT Corporation in 2012.
- From 2019 to 2020, I was visiting researcher at Ruhr-university Bochum.
- I received my Ph.D. from Kobe University in March 2017 (supervisor: Masakatu Morii).
- The title of my Ph.D. thesis is “Integral Cryptanalysis against Symmetric-Key Cryptosystems.”
- My research area is cryptography. Especially the design and analysis of symmetric-key cryptography.
- Link : [dblp] [google scholar]
- E-mail : todo[dot]yosuke[atmark]gmail[dot]com
Recent Major Activity
- The paper “Practical Committing Attacks against Rocca-S”, was accepted by Inf. Process. Lett.
- The paper “Divide-and-Conquer Trail Enumeration Puncturing: Application to Salsa and ChaCha” was accepted by Asiacrypt 2025.
- The paper “Improving Linear Key Recovery Attacks using Walsh Spectrum Puncturing” was accepted by the Journal of Cryptology.
- The paper “All You Need is XOR-Convolution: A Generalized Higher-Order Side-Channel Attack with Application to XEX/XE-based Encryptions” was accepted by IACR TCHES.
- The paper “Improved Cryptanalysis of ChaCha: Beating PNBs with Bit Puncturing” was accepted by Eurocrypt 2025.
- The paper “Side-Channel Linearization Attack on Unrolled Trivium Hardware” was accepted by IACR CiC.
- The paper “General Practical Cryptanalysis of The Sum of Round-Reduced Block Ciphers and ZIP-AES” was accepted by Asiacrypt 2024.
- The paper “Multiple-Tweak Differential Attack Against SCARF” was accepted by Asiacrypt 2024.
Please check the page for publication list in detail.
Awards
- Apr. 2024, The Commendation for Science and Technology by the Minister of Education, Culture, Sports, Science and Technology, The Young Scientists’ Award.
- Mar. 2023, FSE 2023 Best Papers Award, IACR.
- Sep. 2020, IEICE Fundamentals Review Best Author Award, IEICE
- Aug. 2020, CRYPTO 2020 Best Paper Award, IACR.
- Jun. 2019, IEICE Best Papers Award, IEICE.
- Jan. 2016, SCIS Best Papers Award, SCIS 2015, ISEC, IEICE.
- Aug. 2015, CRYPTO 2015 Best Paper Award, IACR.
- Aug. 2015, CRYPTO 2015 Best Young Researcher Award, IACR.
Program Committee
ArcticCrypt: 2024
ASIACRYPT: 2016, 2018, 2023
CHES: 2021, 2022
CRYPTO: 2023, 2024
Eurocrypt: 2016, 2020, 2024, 2025
FSE: 2018 — 2022, 2024 –2025, 2026 (chair)
Latincrypt: 2019
Selected Areas in Cryptography (SAC): 2019 — 2024
Editorial Board
IACR Transactions on Symmetric Cryptology (ToSC)
Mar. 2017 — Feb. 2022,
Mar. 2023 — Feb. 2025,
Mar. 2025 — Feb. 2027 (editor-in-chief)
IACR Transactions on Cryptographic Hardware and Embedded Systems (TCHES)
Jul. 2020 — Jun. 2022.
Design
- 2024 ZIP-AES, appeared at Asiacrypt 2024, Fast Pseudorandom Function
- 2023 SCARF, appeared at Usenix Security 2023, Secure Cache Randomization Function
- 2021 Trivium-LE and Triad-LE, appeared at FSE 2022, Low-Energy Stream Ciphers
- 2021 Sycon v2, appeared in the Journal of Cryptographic Engineering, Lightweight Cryptographic Permutation, and AEAD
- 2020 Prince v2, appeared at SAC 2020, Low-Latency Block Cipher
- 2017 Gimli, appeared at CHES 2017, Cross-Platform Cryptographic Permutation
- 2017 GIFT, appeared at CHES 2017, Lightweight Block Cipher
- 2014 Minalpher, appeared at CAESAR, Authenticated Encryption with Associated Data
Yosuke Todo 