| 2005 | ICCSA | An Effective Method for Analyzing Intrusion Situation Through IP-Based Classification. | Minsoo Kim, Jae-Hyun Seo, Seungyong Lee, BongNam Noh, Jung Taek Seo, Eung Ki Park, Choonsik Park |
| 2004 | PDCAT | Adaptation Enhanced Mechanism for Web Survivability. | Eung Ki Park, Dae-Sik Choi, Jung Taek Seo, Choonsik Park, Dongkyu Kim |
| 2001 | CRYPTO | New Public Key Cryptosystem Using Finite Non Abelian Groups. | Seong-Hun Paeng, Kil-Chan Ha, Jae Heon Kim, Seongtaek Chee, Choonsik Park |
| 2000 | CRYPTO | New Public-Key Cryptosystem Using Braid Groups. | Ki Hyoung Ko, Sangjin Lee, Jung Hee Cheon, Jae Woo Han, Ju-Sung Kang, Choonsik Park |
| 2000 | ICISC | A Note on the Higher Order Differential Attack of Block Ciphers with Two-Block Structures. | Ju-Sung Kang, Seongtaek Chee, Choonsik Park |
| 1999 | EuroCrypt | S-boxes with Controllable Nonlinearity. | Jung Hee Cheon, Seongtaek Chee, Choonsik Park |
| 1999 | ICISC | On the Optimal Diffusion Layers with Practical Security against Differential and Linear Cryptanalysis. | Ju-Sung Kang, Choonsik Park, Sangjin Lee, Jong In Lim |
| 1998 | ICISC | How to construct balanced Boolean functions with good global avalanche characteristics. | Sangwoo Park, Seongtaek Chee, Choonsik Park, Soo Hak Sung |
| 1996 | CARDIS | On the Design of a Stream Cipher and a Hash Function Suitable to Smart Card Applications. | Yongdae Kim, Sangjin Lee, Choonsik Park |
| 1993 | EuroCrypt | Efficient Anonymous Channel and All/Nothing Election Scheme. | Choonsik Park, Kazutomo Itoh, Kaoru Kurosawa |
| 1993 | EuroCrypt | On Key Distribution and Authentication in Mobile Radio Networks. | Choonsik Park, Kaoru Kurosawa, Tatsuaki Okamoto, Shigeo Tsujii |