| 2022 | WISA | Analysis of Radioactive Decay Based Entropy Generator in the IoT Environments. | Taewan Kim, Seyoon Lee, Seunghwan Yun, Jongbum Kim, Okyeon Yi |
| 2017 | WISA | Key Managements of Underwater Acoustic Communication Environments. | Hyunki Kim, Jae-Hoon Lee, Okyeon Yi |
| 2014 | WISTP | A Security Analysis of Key Expansion Functions Using Pseudorandom Permutations. | Ju-Sung Kang, Nayoung Kim, Wangho Ju, Okyeon Yi |
| 2007 | ICCSA | Fingerprint Template Protection Using Fuzzy Vault. | Daesung Moon, Sungju Lee, Seunghwan Jung, Yongwha Chung, Miae Park, Okyeon Yi |
| 2006 | WISA | Privacy-Enhancing Fingerprint Authentication Using Cancelable Templates with Passwords. | Daesung Moon, Sungju Lee, Seunghwan Jung, Yongwha Chung, Okyeon Yi, Namil Lee, Kiyoung Moon |
| 2001 | ACISP | Pseudorandomness of MISTY-Type Transformations and the Block Cipher KASUMI. | Ju-Sung Kang, Okyeon Yi, Dowon Hong, Hyun Sook Cho |
| 2001 | ASIACRYPT | Known-IV Attacks on Triple Modes of Operation of Block Ciphers. | Deukjo Hong, Jaechul Sung, Seokhie Hong, Wonil Lee, Sangjin Lee, Jongin Lim, Okyeon Yi |
| 2001 | ASIACRYPT | Provable Security of KASUMI and 3GPP Encryption Mode f8. | Ju-Sung Kang, Sang-Uk Shin, Dowon Hong, Okyeon Yi |
| 2001 | ICISC | Concrete Security Analysis of CTR-OFB and CTR-CFB Modes of Operation. | Jaechul Sung, Sangjin Lee, Jong In Lim, Wonil Lee, Okyeon Yi |
| 2000 | ACISP | A Proposal of a New Public Key Cryptosystem Using Matrices over a Ring. | Heajoung Yoo, Seokhie Hong, Sangjin Lee, Jong In Lim, Okyeon Yi, Maenghee Sung |