2021

Console Weekly #82

  • Talked about Shisho and what it was like becoming the CTO of a Japanese cyber security company.
  • Click here to read the interview!

NoMaps Conference 2021

  • Appeared at a Q&A session about developer experience.
  • See this page for further information

LOCAL Developer Day Online ’21 /Security

  • Gave a talk about developer-first security.
  • See this page for further information

Security Camp 2021

詳解セキュリティコンテスト

  • Contributed some parts to a book describing all about CTF written by some specialists.
  • Check out this Amazon page to order the book!

MITOU Target Program

  • Got a research grant from MITOU Target Program, called 未踏ターゲットプログラム in Japanese, for our team development of next-gen quantum-classical programming language.
  • See this page for further information.

SECCON Beginners CTF 2021

  • Organized some parts of the project.
  • Provided a Web challenge named osoba.

Web24 (Online)

  • Discussed the future of Web security with great security engineers.
  • See here to check the detail of the event!

Go Conference Tokyo 2021 Spring (Online)

Security Mini Camp in Osaka 2021 / セキュリティ・ミニキャンプ in 大阪 2021

  • Gave a short seminar on Web-related modern security aspects.
  • See the event page for further information of this book.

漠然とした不安との素敵な付き合い方

  • Contributed an article explaining how to deal with anxiety about cyber security for NISC's website.
  • You can read the article from here (Wayback Machine).

#139​ 書籍「Webブラウザセキュリティ」と、2011年の釧路でつながったぼくらの縁

書籍「Webブラウザセキュリティ」発刊記念 著者&レビュアー対談

  • Appeared in an interview article in Japanese: 前編, 後編.

セキュアにGoを書くための「ガードレール」を置こう - 安全なGoプロダクト開発に向けた持続可能なアプローチ

Proxy-Wasm + Rust による Envoy の拡張 ―― 独自メトリクスの追加を例に

Webブラウザセキュリティ ― Webアプリケーションの安全性を支える仕組みを整理する

  • Published a book on security features of web browsers.
  • See this page for further information of this book.

2020

Security Camp 2020

  • Conducted a 4-hour training named "Web Security from the Macro Perspective: Understanding Modern Hacking Techniques with Web Infrastructure and Side-channels" (日: 「マクロな視点から捉える Web セキュリティ: Web インフラストラクチャを利用した攻撃とサイドチャネル攻撃の実践と評価」).
  • Reference: event page

CODE BLUE 2020

  • Appeared in a panel discussion named "Why organize a CTF -This is the way-" (日: 「我々はなぜCTFを運営するのか?」).
  • Reference: event page

SECCON Beginners Live

  • Gave a presentation about CTFs and how to learn security stuffs related to them.
  • Reference: event page

SECCON CTF 2020

Security Mini Camp in Yamanashi 2020 / セキュリティ・ミニキャンプ in 山梨 2020

  • Gave a presentation to introduce activities of Security Camp Committee.
  • Reference: event page

OWASP Kansai - 体系的に学ぶモダン Web セキュリティ @ 京都 (Learning Modern Web Security @ Kyoto)

  • Did a online & long-term course on Web security.
  • Reference: event page.

OWASP Night 2020/02 (by OWASP Japan)

  • Talked about issues related to ReDoS and show a new attack vector.
  • Reference: event page

SECCON Beginners CTF 2020

  • Organized the whole project.
  • Provided two challenges: unzip and somen.

2019

IPA Workshop - Learning Modern Web Security / IPA ワークショップ 体系的に学ぶモダン Web セキュリティ

  • Did an eight-hour workshop on web security in collaboration with Information-technology Promotion Agency.

CODE BLUE CTF 2019

  • Provided a challenge named "Snippet".

#websecjp: Learning Modern Web Security / #websecjp: 体系的に学ぶモダン Web セキュリティ

  • Did an eight-hour workshop on web security at National Institute of Information and Communications Technology (NICT) Innovation Center.
  • Reference: event page

Security Camp 2019

  • Conducted a 4-hour training named "体系的に学ぶモダン Web セキュリティ" (Learn Modern Web Security Systematically).
  • Reference: event page

JNSA e-zine ("BlackHat USA 2019 参加記")

  • Contributed an article to JNSA (Japan Network Security Association) e-zine.
  • Reference: article

Packet Hacking Village of DEFCON 2019

  • Participated as a volunteer staff.

Security Mini Camp in Yamanashi 2019 / セキュリティ・ミニキャンプ in 山梨 2019

  • Gave a presentation to introduce activities of Security Camp Committee.
  • Reference: event page

SECCON Beginners CTF 2019

  • Provided three challenges: Ramen, Secure Meyasubako, and Himitsu.

Shibuya.XSS techtalk #11

  • Gave a presentation on hot topics on XS-Leaks and advanced CSS Injection.
  • Reference: event page

TSG CTF 2019

  • Provided two challenges: RECON and BADNONCE.

2018

Security Mini Camp in Okayama 2018 / セキュリティ・ミニキャンプ in 岡山 2018

  • Conducted a 4-hour introduction-level class on Web security.
  • Reference: event page

第 14, 15, 19, 22 回 ゼロから始めるセキュリティ入門 勉強会

  • Gave a small presentations on hot topics on Web security at the time.
  • Reference: event page

第21 回 セキュリティさくら (Security Sakura, a Japanese seminar on security)

  • Talked on the complexity of Web and its security from the viewpoint of attackers.
  • Reference: event page

SECCON Beginners CTF 2017

  • Provided three challenges: Gimme your comment, SECCON Goods, Gimme your comment Revenge.

2013

OSC Hokkaido 2013 #osc13do

  • Gave a small presentation.
  • Reference: event page