Bachelor of Mathematics (2001), Korea University, Master of Information Security & Cryptography (2003), Korea University, PhD of Information Security & Cryptography (2008), Korea University, Researcher at University of Waterloo, Canada (2006) Post Doc at Columbia University, USA (2008-2009), Researcher at Computer Security Division, National Institute of Standards and Technology (NIST), USA (2009-2012), Associate Professor, IIIT-Delhi, India (2012-present)