Elliptic-shiho.github.io


About me

  • Shiho Midorikawa a.k.a. elliptic-shiho
  • I'm a Security Engineer / CTF player
  • Working at GMO Cybersecurity by Ierae, Inc.
  • A lecturer of Security-Camp 2018-2023 (a course of cryptographic implementation)

  • A student of Security-Camp 2015
  • Cybozu labs youth 5th / 6th (ecpy)

Likes/Loves

  • Capture The Flag
  • Information Security
  • Cryptography (especially public-key cryptosystem)
  • Mathematics

CTFs

  • DCTF 2016 Finals 1st (scryptos)
  • 0CTF 2017 Finals 3rd (binja)
  • Midnight Sun CTF 2018 Finals 2nd (scryptos)
  • CryptoCTF 2023 13th (ierae, the score is equal to 1st)
  • zer0pts CTF 2023 4th (ierae)
and more

Links/Contact

Twitter Bluesky Github CTF Writeups 1 CTF Writeups 2 Hatena Blog E-Mail