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 * 2004. 3 - 2011. 2: Ph.D. Department of Mathematical Sciences, College of Natural Sciences, Seoul National University, Seoul, Korea (Major: Cryptology)* 2000. 3 - 2004. 2: B.S. Department of Mathematics, College of Science, Korea University, Seoul, Korea

 * 2018. 3 - : Associate professor, Department of Mathematics, Hanyang university, Seoul, Korea* 2017. 3 - 2018. 2 : Associate professor, Department of Mathematics, Myongji university, Yongin, Korea* 2013. 3 - 2017. 2 : Assistant professor, Department of Mathematics, Myongji university, Yongin, Korea* 2011. 4 - 2013. 2 : Researcher, Security Architecture Laboratory, Network Security Research Institute, National Institute of Information and Communications Technology (NICT), Japan* 2009. 10 - 2010. 3: Visiting, University of California, Irvine, USA** Host: Prof. Stanislaw Jarecki** Researched on multiparty privacy-preserving set operations* 2008. 7 - 2008. 8: Summer intern, NTT Information Sharing Platform Labs, Tokyo, Japan** Host: Dr. Tatsuaki Okamoto** Researched on identity-based cryptography.* 2002. 7 - 2002. 8: Summer intern, Management Systems Lab, Department of Information Management Engineering, College of Engineering, Korea University, Seoul, Korea** Host: Prof. Youngho Lee** Constructed an optimization algorithm and program using MS Visual Basic. 

 * 2018 올해의 신진 연구자 (자연과학 분야) 선정** Excellent Young Researcher Award, NRF & Elsevier, 2018.* Sang-San Young Mathematician Award, Korean Mathematical Society, 2012. * Top (2012), Second (2013), Participant (2006) Prizes in the National Cryptographic Technology Contest, National Intelligence Service, Korea.* BK21 student paper award, BK21 Mathematical Sciences Division, College of Natural Sciences, Seoul National University, 2009. * Graduate study scholarships, Seoul National University, 2006 & 2010. <br /> ==교내 매체== *<뉴스H> 2025.10.01 [https://cms.newshyu.com/news/articleView.html?idxno=1020681 <nowiki>[HYPER] 딥러닝 기반 얼굴인증 시스템의 보안 취약점을 입증하다</nowiki>] *<뉴스H> 2025.03.27 [https://cms.newshyu.com/news/articleView.html?idxno=1018117 한양대 서재홍 교수팀, 딥러닝 기반 얼굴 인증 시스템의 보안 취약점 입증... 100번 시도만으로 사용자 얼굴 이미지 복구]*<뉴스H> 2025.04.10. [https://www.newshyu.com/news/articleView.html?idxno=1018297 서재홍 교수팀, 딥러닝 기반 얼굴인증 시스템의 보안 취약점 입증하다]