About

Yunjong Jeong

Student at School of Computing
Korea Advanced Institute of Science and Technology (KAIST)
Member of in-campus hacking group GoN and KaisHack.
Interested in software engineering, applied cryptography and reverse engineering.

yunjong (at) kaist.ac.kr
blukat29
blukat29

Education

• M.S., Information Security, KAIST. (2017-2020)
• B.S., Computer Science, KAIST. (2013-2017)

Academic Papers

• J. Kim, D. Jang, Y. Jeong and B. B. Kang, “POLaR: Per-Allocation Object Layout Randomization”, IEEE Conference on Dependable Systems and Networks (DSN), 2019. paper
• D. Jang, Y. Jeong, S. Lee, M. Park, K. Kwak, D. Kim, and B. B. Kang, “Rethinking Anti-Emulation Techniques for Large-Scale Software Deployment”, Computers & Security, 2019. paper
• D. Jang, J. Kim, H. Lee, M. Park, Y. Jeong and B. B. Kang, “On the Analysis of Byte-Granularity Heap Randomization”, IEEE Transactions on Dependable and Secure Computing (TDSC), 2019. pdf

Work experience

• Software Developer, TEEware (2018-)
  Security softwares for data-in-use encryption and key management.
  ARM TrustZone, Intel SGX, AWS, Azure, Kubernetes, C++, Go
• Software Developer, EXEM. (2015)
  Developed large-scale automated video surveillence system.
  Apache spark, Kafka, OpenCV, Spring framework, Java, Scala
• Security Researcher, Pinion Industries. (2014)
  Android and web penetration testing.
• Student Senior, KAIST Computer Emergency Response Team (CERT). (2013-2015)
  Penetration testing and incident response.

Technical skills

• Languages - C, C++, Go, bash, Python
• Tools - Git, Vim, OpenSSL, Amazon AWS (devicefarm), MS Azure (aks, acr, acc)
• DevOps - Docker, Compose, Kubernetes, Jenkins

Code

• Regex Crossword Solver - Solves RegexCrossword with Z3. blog.
• libc.blukat.me - Lookup libc library version from information leaks.
• decode.blukat.me - Analyze data of unknown encoding.
• unollvm - Obfuscator-LLVM deobfuscator that produces patched binary.
• Qual - GoN CTF website. link
• Open source contributions - my GitHub pull requests

CTF (Hacking competition)

• Cyber Conflict Excercise 2018 Blue Team 3rd
• Organized Samsung CTF 2018 (as Kaishack) (Qual source, Finals source)
• Organized Samsung CTF 2017 (as Kaishack) (CTF source)
• Codegate 2017 Finals 3rd (Old GoatskiN)
• DEFCON CTF 2016 Finals 5th (Kaishack_GoN)
• SECCON CTF 2016 Finals 2nd (PwnPineappleApplePwn)
• Belluminar 2015 2nd (GoN)
• Ghost in the Shellcode 2015 3rd (GoN)
• 2014 Whitehat Contest 2nd (GoN)