|Full-time Security Researcher, SEWorks Inc.||Sept 2018 -
» Mainly focusing on web security researches and automated security analysis.
» Developing and Maintaining flagship products.
|Signaller, ROK Army||Nov 2016 - Aug 2018
1y 8 months
» Discharged as Sergeant. Received many awards while working in the army.
» Maintained internal systems, managed and monitored security firewalls.
» Developed an application which automatically checks security status and prints out the report on every boot.
» Developed the pentest software to increase awareness on the side-effects of using smartphones in the army.
|Full-time Security Researcher, SEWorks Inc.||June 2014 - Nov 2016
2y 4 months
» Focused mainly on core server management and backend service development.
» Developed core products, including product maintanence. (Uses python, GoLang+Redis, PHP, Java, etc.)
» Frequently performed vulnerability checks and penetration tests on flagship products.
» Focused on security researches for future developments.
|Undergraduate Student, University of Toronto||Sept. 2014 - June 2015
|» Currently studying as an undergraduate, and is going to acquire a Bachelor’s degree.
» Currently on a long leave for jobs.
|International Baccalaureate Diploma||Sept. 2012 - June 2014
1y 9 months
» Acquired International Baccalaureate Diploma for Secondary School.
» Studied in an Indian International school.
(Physics HL, Computer Science HL, Mathematics HL, English B HL, Korean A SL, Economics SL)
|2017||Finalist, CodeGate CTF 2017||Seoul, South Korea|
|2016||1st place @ CTFTime! \o/|
|2016||2nd place, EKOPARTY CTF 2016||Latin America|
|2016||2nd place, Silk Road CTF 2016||Karamay, China|
|2016||1st place, ASIS CTF Finals||Tehran, Iran|
|2016||1st place, C4CTF 2016||Riyadh, Saudi Arabia|
|2016||1st place, TU CTF 2016||Tulsa, OK|
|2016||1st place, Sharif University CTF||Tehran, Iran|
|2016||2nd place, Internetwache CTF||Berlin, Germany|
|2016||Finalist, PHDays 2016||Moscow, Russia|
|2015||1st place, Hack Zone Tunisia 2015||Manouba, Tunisia|
|2015||1st place, Break In 2015||Hyderabad, India|
|2015||Finalist, CSAW CTF 15 Hacking Competition NA Finals||Brooklyn, NY|
|2014||Finalist, CSAW CTF 14 Hacking Competition NA Finals||Brooklyn, NY|
|2014||Finalist, DEFCON 22nd CTF Hacking Competition World Finals||Las Vegas, NV|
|2014||2nd place. Olympic Sochi CTF 2015 (Acquired DEFCON Qualifier)|
|2015||1st place, 14th HUST Hacking Festival||Seoul, South Korea|
|2015||1st place, 2015 Inc0gnito Hacking Competition||Seoul, South Korea|
|2018||1st place, Korean Army Hacking Defense Contest||Daejeon, South Korea|
|CTF Organizer and Security Challenge Author||2014 - PRESENT|
|Web Fuzzer Development and its Utilization||June 2014|
Talked on WOWHACKER 2nd Seminar. Seoul, Korea
» a.k.a. Introduction to web fuzzer development.
» Demonstrated the process of web fuzzer development and its utilization, including the practical usage of fuzzers and its utilizations.
» Presentations available at //goo.gl/VabWPK
|Stereotyped Challenges||Oct. 2014 - PRESENT
3y 11 months
» Operating and developing a website consisting of extremely technical offensive security challenges.
» Most of challenges are solely developed and tested by me. all challenges are sandboxed seperately.
» Sourcecode of the website is currently available on //github.com/stypr/chall.stypr.com
|Language||PHP (Native), Python (Native), SQL (Native), VB (Mediocre), C (Mediocre), Go (Mediocre), Java (Mediocre), ASM (Beginner)|
|Korean (Native), English (Native), Mandarin (Beginner), Japanese (Beginner)|
|Softwares||WireShark, Chrome/Firefox devtools, WireShark, Hex-rays, My Own Fuzzer, x64dbg, NetCat, Fiddler|
|HeidiSQL, HxD, Git, VMWare, qemu, ESXi, etc.|