Highlights

• CSS Outstanding Paper Award

  Computer Security Symposium 2025 — 13 of 270+ papers, youngest recipient to date

• DeMeSSAI 2026

  First-author, peer-reviewed workshop paper at EuroS&P 2026 — evaluating LLM agents in binary exploitation

• SBFT 2026

  First-author, peer-reviewed workshop paper at ICSE 2026 — state-aware test case minimization for network protocols

• BAR 2026

  First-author, peer-reviewed workshop paper at NDSS 2026 — LLM agent failure patterns and software protection

Research

• Microarchitectural Attacks on Trusted Execution Environments

  Investigating how hardware behavior affects the isolation guarantees of TEEs.

• LLM Agents in Offensive Security

  Measuring what LLM agents can do in binary analysis and exploitation, and where they fail.

• Security of RISC-V Privileged Software

  Building Hisame to automate testing of RISC-V firmware at the highest privilege level.

• Automated Testing of Protocol Implementations

  Reducing protocol test cases while preserving the states needed to reproduce a failure.

Read about the research

Selected Publications

1. CSS 2025October 2025

   Privilege Escalation Attack to RISC-V Keystone TEE via RowHammer

   Ryutaro Nishizaka, Hidemasa Kawasaki, Shinya Takamaeda, Soramichi Akiyama

   Computer Security Symposium 2025 (CSS)pp. 1875-1882

   CSS Outstanding Paper AwardIPSJ LibraryCiNii

2. DeMeSSAI@ EuroS&P '26July 2026

   How Far Can LLM Agents Go in Binary Exploitation? A CTF-Based Evaluation

   Ryutaro Nishizaka, Yudai Fujiwara, Yuichi Sugiyama

   5th International Workshop on Designing and Measuring Security in Systems with AI, co-located with EuroS&P 2026

   Workshop program

3. SBFT@ ICSE '26April 2026

   IPSM-Based Test Case Minimization for Network Protocol Implementations

   Ryutaro Nishizaka, Kazushi Kato, Yuichi Sugiyama

   19th International Workshop on Search-Based and Fuzz Testing (SBFT), co-located with ICSE 2026

   doi:10.1145/3786155.3788580

4. BAR@ NDSS '26February 2026

   Towards LLM-Resistant Software Protection: Agent Failure Patterns in CTF Reverse Engineering

   Ryutaro Nishizaka, Yudai Fujiwara, Takuya Shimizu, Kazushi Kato, Yuichi Sugiyama

   Workshop on Binary Analysis Research (BAR) 2026, co-located with NDSS Symposium 2026

   PDF

All publications

Recent Activities

Full CV