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Home | Seminars and Symposia | Past seminars/symposia: Friday, November 15, 2002

Non-abelian Cryptography and its Analysis


Jung Hee Cheon
ICU, Korea

Friday, November 15, 2002
4:00 pm

6-212 EE/CS

Recently, several cryptosystems were proposed based on conjugacy problems on non-abelian groups. In this talk, Dr. Cheon will introduce hard problems in non-abelian groups and survey how to design encryption and signature schemes using these hard problems. Dr. Cheon will introduce a new polynomial time algorithm for the Diffie-Hellman type conjugacy problem on braids, which was submitted to Eurocrypt 2003.


Dr. Jung Hee Cheon received his B.S., M.S., and Ph.D. degrees in mathematics from Korea Advanced Institute of Science and Technology (KAIST) in 1991, 1993, and 1997, respectively. For three years from 1997, he worked for Electronics and Telecommunications Research Institute (ETRI). In 2001 he held post doctorate position at Brown University working with J. Silverman. Currently he is an assistant professor at department of information security at Information and Communications University (ICU). He has published seven papers on number theory journals and fourteen papers on cryptography conferences including three papers in Crypto and Eurocrypt. He is one of the co-authors of braid cryptography and Xedni calculus on elliptic curve discrete logarithms. His research interests include elliptic curve cryptography, non-abelian group cryptography, Boolean functions, and cryptographic protocols.