Ryutaro Nishizaka
Curriculum Vitae
Career & Education
2026/07 – present
Member, 10th Cohort
Masason Foundation
2025/04 – present
Organizing Committee
SECCON Beginners
2024/07 – present
Part-time Security Researcher
Ricerca Security, Inc.
2024/04 – present
Rikkyo Niiza Senior High School
2024/03
Rikkyo Niiza Junior High School
Graduated — Honors Award
Publications
Peer-reviewed
DeMeSSAI@ EuroS&P '26July 2026
How Far Can LLM Agents Go in Binary Exploitation? A CTF-Based Evaluation
5th International Workshop on Designing and Measuring Security in Systems with AI, co-located with EuroS&P 2026
IEEE S&P '26Poster SessionMay 2026
Poster: Where Do LLM Agents Fail in Binary Exploitation?
47th IEEE Symposium on Security and Privacy
SBFT@ ICSE '26April 2026
IPSM-Based Test Case Minimization for Network Protocol Implementations
19th International Workshop on Search-Based and Fuzz Testing (SBFT), co-located with ICSE 2026
BAR@ NDSS '26February 2026
Towards LLM-Resistant Software Protection: Agent Failure Patterns in CTF Reverse Engineering
Workshop on Binary Analysis Research (BAR) 2026, co-located with NDSS Symposium 2026
Domestic conferences
CSS 2025October 2025
Privilege Escalation Attack to RISC-V Keystone TEE via RowHammer
Computer Security Symposium 2025 (CSS)pp. 1875-1882
CSS Outstanding Paper AwardIPSJ LibraryCiNii
CSS 2025October 2025
State-Aware Test Case Minimization for Network Protocol Implementations
Computer Security Symposium 2025 (CSS)pp. 937-944
Activities & Awards
2026
Masason Foundation33 selected nationwide
Selected for the 10th cohort, open to ages 10 to 20.
IPSJ 88th National Convention
Received the Best Poster Presentation Award.
BAR 2026
Presented a first-author paper at the Workshop on Binary Analysis Research, co-located with NDSS 2026.
- Towards LLM-Resistant Software Protection: Agent Failure Patterns in CTF Reverse Engineering
SBFT 2026
Presented a first-author paper at the International Workshop on Search-Based and Fuzz Testing, co-located with ICSE 2026.
- IPSM-Based Test Case Minimization for Network Protocol Implementations
DeMeSSAI 2026
Presented a first-author paper at the International Workshop on Designing and Measuring Security in Systems with AI, co-located with EuroS&P 2026.
- How Far Can LLM Agents Go in Binary Exploitation? A CTF-Based Evaluation
2025
Computer Security Symposium 2025 (CSS2025)13 of 270+ papers
Presented two first-author papers. One received the Outstanding Paper Award, as the youngest recipient to date.
SecHack3656 of 30 works
Accepted into the Learning Course (Sakai seminar) and named an Outstanding Graduate.
IPSJ 87th National Convention
Poster presentation.
SECCON Beginners CTF 2025 (CTF4b)
Served on the organizing team and authored three pwn challenges (pivot4b / pivot4b++ / TimeOfControl).
JST GSC Experts in Information Science
Completed the second stage.
Media coverage
A second interview featured on the school website.
2024
CognitiveHack Japan 2024
Champion in both the Junior Division and the Junior School Division.
JST GSC Experts in Information Science~40 selected nationwide
Selected for the 5th cohort; completed the first stage.
Japanese Olympiad in Informatics
Qualified for the final round.
Machine Learning Specialization
Completed.
UK-Japan Young Scientists Workshop
Completed.
2023
Registered Information Security Specialist
Passed the examination at the youngest age on record and registered as a specialist.
Security Camp National Convention
Completed Class C (Threat Analysis).
Security Mini Camp in Tokyo
Completed Track C (Malware Analysis).
Media coverage
Featured on the school website.
Certifications
- Registered Information Security SpecialistRegistration No. 026794
- Applied Information Technology Engineer