Takashi Yoneuchi

Security Engineer at Flatt Security Inc.

• Designing and developing training courses for developers and security professionals.

Lecturer at Web System Design Program (WEBSYS)

• WEBSYS is a certificate program provided by the University of Electro-Communications.
• Conducting a class on cybersecurity.

Part-time Security Engineer at IERAE Security Inc.

• Did vulnerability testing of Web applications.

Student Researcher at IBM Research - Tokyo

• Mainly forcused on network security and applied a patent (mentioned below).

Undergraduate Student, Department of Information Science, Faculty of Science, the University of Tokyo, Japan.

Currently studying as an undergraduate student on Computer Science.

SECCON Beginners

• SECCON Beginners is an non-profit organization that holds events for beginners of CTF.
• Organizing some events in Japan as a leader.

Security Camp Committee

• Conducting some training courses on Web security.
• Supporting other trainers technically and mentally.

Comprehensive homographic string detection

• By three inventors including me.
• Patent ID: US20200134102A1

Research on Blind Regular Expression Attack

• Proposed a brand-new theoritical attack that abuses Regular Expression (regexp) engines.
• Got featured by some famous news sites including The Daily Swig.
• Reference: detailed information ("A Rough Idea of Blind Regular Expression Injection Attack").

Development of RISC-V CPU on FPGA from scratch

• Developed a RISC-V CPU on which Linux kernel runs successfully with some friends of mine.
• Reference: related article.
• Reference: GitHub repositories.

CVE-2020-6400

• Found inappropriate implementation in CORS in Google Chrome.
• Reference: cve.mitre.org

CVE-2018-16205

• Found an Stored XSS.
• Reference: cve.mitre.org

SECCON CTF 2019 Finals (Domestic)

• Won the 1st as team dodododo.

SECCON CTF 2018 Finals (Domestic)

• Won the 1st as team dodododo.

SECCON CTF 2017 Finals (International)

• Won the 3st as team dodododo.

SECCON CTF 2013 Hokkaido

• Won the 1st as team dodododo.
• Reference: event page.