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HAYATO KIMURA

HAYATO KIMURA

Researcher
Security Fundamentals Laboratory
Cybersecurity Research Institute

Hayato Kimura received his B.E. and Master of Information and Telecommunication Engineering degrees from Tokai University in 2019 and 2021, respectively. From 2021 to 2025, he worked at LINE Corporation (currently LY Corporation).

Since 2025, he has been a researcher at the National Institute of Information and Communications Technology, Japan.

His current research interests include cryptography, information security, system security, and cryptographic protocol. He received the IWSEC 2017 Best Poster Award in 2017, JIP Specially Selected Paper 2023. He is a member of IPSJ and IACR.

Research interests
Security Analysis of Real-world Systems, Cryptanalysis of Symmetric Key Ciphers
Keyword
End-to-End Encryption, Symmetric Key Cryptography, System Security

Selected papers

  • Hayato KIMURA, Ryoma ITO, Kazuhiko MINEMATSU, Shogo SHIRAKI and Takanori ISOBE, "Not in The Prophecies: Practical Attacks on Nostr, " 10th IEEE European Symposium on Security and Privacy (EuroS&P 2025) , 2025.
  • Hayato KIMURA, Keita EMURA, Takanori ISOBE, Ryoma ITO, Kazuto OGAWA, and Toshihiro OHIGASHI, "A Deeper Look into Deep Learning-based Output Prediction Attacks Using Weak SPN Block Ciphers, " Journal of Information Processing, vol.31, pp.550-561, Sept. 2023.

Awards

  • JIP Specially Selected Paper (Sept. 2023)
  • IWSEC 2017 Best Poster Award
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