| 2019 | ICISC | Revised Version of Block Cipher CHAM. | Dongyoung Roh, Bonwook Koo, Younghoon Jung, Ilwoong Jeong, Donggeon Lee, Daesung Kwon, Woo-Hwan Kim |
| 2017 | ICISC | CHAM: A Family of Lightweight Block Ciphers for Resource-Constrained Devices. | Bonwook Koo, Dongyoung Roh, Hyeonjin Kim, Younghoon Jung, Donggeon Lee, Daesung Kwon |
| 2014 | ICISC | Format-Preserving Encryption Algorithms Using Families of Tweakable Blockciphers. | Jung-Keun Lee, Bonwook Koo, Dongyoung Roh, Woo-Hwan Kim, Daesung Kwon |
| 2011 | ICISC | Biclique Attack on the Full HIGHT. | Deukjo Hong, Bonwook Koo, Daesung Kwon |
| 2010 | ICISC | Related-Key Attack on the Full HIGHT. | Bonwook Koo, Deukjo Hong, Daesung Kwon |
| 2009 | ICISC | Preimage Attacks on Reduced Steps of ARIRANG and PKC98-Hash. | Deukjo Hong, Bonwook Koo, Woo-Hwan Kim, Daesung Kwon |
| 2009 | ICISC | Improved Preimage Attack for 68-Step HAS-160. | Deukjo Hong, Bonwook Koo, Yu Sasaki |
| 2006 | ICISC | On Constructing of a 32 32 Binary Matrix as a Diffusion Layer for a 256-Bit Block Cipher. | Bonwook Koo, Hwan Seok Jang, Jung Hwan Song |
| 2003 | WISA | Constructing and Cryptanalysis of a 16 × 16 Binary Matrix as a Diffusion Layer. | Bonwook Koo, Hwan Seok Jang, Jung Hwan Song |