An Efficient Implementation of Braid Groups. - Jae Choon Cha; Ki Hyoung Ko; Sangjin Lee; Jae Woo Han; Jung Hee Cheon (ASIACRYPT, 2001)

An Identity-Based Signature from Gap Diffie-Hellman Groups. - Jae Choon Cha; Jung Hee Cheon (IACR Cryptol. ePrint Arch., 2002)