Head of Security

About Allen.

Allen is a Security Researcher who works on research and audits with a focus on smart contract security and cryptography. He is currently on a temporary break from Seoul National University, where he double majors Mathematics and Computer Science.

Along with Paul, Allen won HITCON, SECCON as a member of the Super Guesser CTF team and also qualified for the DEFCON Finals. In the team, he is in charge of solving cryptography and smart contract security challenges. He is also experienced in DeFi asset management and blockchain service development, and uses this experience to help him do audits well.

He has been deeply involved in the Competitive Programming community and has won the 2nd prize in Samsung Collegiate Programming Contest 2020 and the Silver Prize in ACM-ICPC Seoul Regional 2019. He also currently has the 1st rank in Project Euler in South Korea. As a high school student, he went in for math olympiad, becoming a candidate for the IMO Korean National Team. This math experience and love of cryptography lead him to study zero knowledge proofs.

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  • KALOS - powered by HAECHI LABS, Security Researcher (2022.05 ~ Present)
  • HYPERITHM (2021.7 ~ 2022.5)

Notable Security Audits

  • DFX Finance (AMM)
  • GroundX NFT Marketplace
  • MarbleX NFT Marketplace
  • Meter Bridge
  • Sygma
  • BiFROST NFT Marketplace

Notable CTF Awards

  • BlackHat MEA CTF Finals 2022 2nd Place
  • SAMSUNG CTF 2022 2nd Place
  • DEFCON 29, 30 Finalist
  • LINE CTF 2022 1st Place
  • SECCON CTF 2021 1st Place
  • Google CTF 2021 Finalist
  • HITCON CTF 2020 1st Place
  • SECCON CTF 2020 1st Place
  • Challenge Author for CODEGATE 2022 and WACON 2022

Notable Found Vulnerabilities

  • THORChain DoS (with Jinu)
  • ChainBridge v2, v3 bugs
  • v2: unsound logic makes it possible for a single malicious relayer to steal assets
  • v3: unsound logic makes it possible for a bridging NFT to be stolen via front-running