May 2011	Scientist of the Month National Research Foundation of Korea and Ministry of Education, Science and Technology
March 2011	K. W. Kwun Chair Professorship POSTECH
April 2009	Excellent Research Paper Award Korean Mathematical Society
December 2005	Best Teaching Award Information and Communications University
March 2002	Postdoctoral Fellowship Korea Science and Engineering Foundation
February 1993	Magna Cum Laude KAIST
October 1988	Silver Medal Korean Mathematical Olympiad
September 1988	Grand Prize The 1st KIT* Science Research Competition
April 1988	Prize of Minister of Science and Technology Korean Olympiad in Informatics
April 1987	Prize of Minister of Education Korean Olympiad in Informatics
April 1986	Prize of Prime Minister and Prize of Minister of Trade and Industry Korean Olympiad in Informatics

* KIT: former name of the undergraduate school of KAIST