| 2018 | ICCSA | Improvement on a Biometric-Based Key Agreement and Authentication Scheme for the Multi-server Environments. | Jongho Moon, Youngsook Lee, Hyungkyu Yang, Hakjun Lee, Sewan Ha, Dongho Won |
| 2015 | ICCSA | Security Improvement of Portable Key Management Using a Mobile Phone. | Jiye Kim, Donghoon Lee, Younsung Choi, Youngsook Lee, Dongho Won |
| 2013 | GPC | Improved Authentication Scheme with Anonymity for Roaming Service in Global Mobility Networks. | Youngseok Chung, Youngsook Lee, Dongho Won |
| 2013 | GPC | Collecting and Filtering Out Phishing Suspicious URLs Using SpamTrap System. | Inkyung Jeun, Youngsook Lee, Dongho Won |
| 2013 | GPC | Security Requirement of End Point Security Software. | Hyun-Jung Lee, Youngsook Lee, Dongho Won |
| 2013 | GPC | On the Use of a Hash Function in a 3-Party Password-Based Authenticated Key Exchange Protocol. | Youngsook Lee, Dongho Won |
| 2011 | HCI | A Practical Analysis of Smartphone Security. | Woongryul Jeon, Jeeyeon Kim, Youngsook Lee, Dongho Won |
| 2011 | HCI | Analysis of Content Filtering Software. | Woongryul Jeon, Youngsook Lee, Dongho Won |
| 2011 | HCI | Cryptanalysis to a Remote User Authentication Scheme Using Smart Cards for Multi-server Environment. | Youngsook Lee, Jeeyeon Kim, Dongho Won |
| 2011 | HCI | Server-Aided Password-Authenticated Key Exchange: From 3-Party to Group. | Junghyun Nam, Juryon Paik, Jeeyeon Kim, Youngsook Lee, Dongho Won |
| 2010 | ISPEC | Attacking and Improving on Lee and Chiu's Authentication Scheme Using Smart Cards. | Youngsook Lee, Hyungkyu Yang, Dongho Won |
| 2009 | ICCSA | Security Vulnerabilities of a Remote User Authentication Scheme Using Smart Cards Suited for a Multi-server Environment. | Youngsook Lee, Dongho Won |
| 2007 | KES | Infringing Key Authentication of an ID-Based Group Key Exchange Protocol Using Binary Key Trees. | Junghyun Nam, Juryon Paik, Youngsook Lee, Jin Kwak, Ung-Mo Kim, Dongho Won |
| 2006 | ICCSA | Two Efficient and Secure Authentication Schemes Using Smart Cards. | Youngsook Lee, Junghyun Nam, Seungjoo Kim, Dongho Won |
| 2006 | ICCSA | An Inter-domain Key Agreement Protocol Using Weak Passwords. | Youngsook Lee, Junghyun Nam, Dongho Won |