| 2010 | AINA | An Authentication and Authorization Protocol Using Ticket in Pervasive Environment. | Jong Sik Moon, Im-Yeong Lee, Kang Bin Yim, Sang-Gu Byeon |
| 2008 | Mobiquitous | A study on authentication/authorization/accounting and roaming mechanism in pervasive environment. | Jong Sik Moon, Jong Hyuk Park, Im-Yeong Lee |
| 2007 | APNOMS | A Study on Low-Cost RFID System Management with Mutual Authentication Scheme in Ubiquitous. | Soo-Young Kang, Im-Yeong Lee |
| 2007 | ICCSA | A Study on Ticket-Based AAA Mechanism Including Time Synchronization OTP in Ubiquitous Environment. | Jong Sik Moon, Im-Yeong Lee |
| 2007 | MMM | A Study on Key Distribution and ID Registration in the AAA System for Ubiquitous Multimedia Environments. | Seo-Il Kang, Deok-Gyu Lee, Im-Yeong Lee |
| 2007 | PAKDD | Privacy Protection Scheme of RFID Using Random Number. | Soo-Young Kang, Im-Yeong Lee |
| 2007 | SecureComm | A study on secure RFID authentication protocol in insecure communication. | Jang-Su Park, Soo-Young Kang, Im-Yeong Lee |
| 2006 | EUC | Broadcast Encryption Using Efficient Key Distribution and Renewal for Ubiquitous Environments. | Deok-Gyu Lee, Jang-Su Park, Im-Yeong Lee |
| 2006 | HPCC | Authentication for Ubiquitous Multi Domain in Pervasive Computing Using PMI. | Deok-Gyu Lee, Jong Sik Moon, Jong Hyuk Park, Im-Yeong Lee |
| 2006 | ICCSA | Authentication for Single/Multi Domain in Ubiquitous Computing Using Attribute Certification. | Deok-Gyu Lee, Seo-Il Kang, Dae-Hee Seo, Im-Yeong Lee |
| 2006 | ICCSA | An Efficient Key Distribution for Ubiquitous Environment in Ad-Hoc Network Using Broadcast Encryption. | Deok-Gyu Lee, Jang-Su Park, Im-Yeong Lee, Yong-Seok Park, Jung-Chul Ahn |
| 2006 | KES | An Intelligent and Efficient Traitor Tracing for Ubiquitous Environments. | Deok-Gyu Lee, Seo-Il Kang, Im-Yeong Lee |
| 2005 | ICCSA | A Study on the E-Cash System with Anonymity and Divisibility. | Seo-Il Kang, Im-Yeong Lee |
| 2005 | ICCSA | A Study on Secure SDP of RFID Using Bluetooth Communication. | Dae-Hee Seo, Im-Yeong Lee, Hee-Un Park |
| 2004 | ICCSA | A Study on Efficient Key Distribution and Renewal in Broadcast Encryption. | Deok-Gyu Lee, Im-Yeong Lee |
| 2004 | ICCSA | A Study on Secure and Effcient Sensor Network Management Scheme Using PTD. | Dae-Hee Seo, Im-Yeong Lee |
| 2004 | ICCSA | A Study on Key Recovery Agent Protection Profile Having Composition Function. | Dae-Hee Seo, Im-Yeong Lee, Hee-Un Park |
| 2003 | ICCS | Designated Verification of Digital Watermark for Network Based Image Distribution. | Hyung-Woo Lee, Im-Yeong Lee |
| 2003 | ICWE | New WAKE Key Recovery Protocol on M-commerce. | Yong-Ho Lee, Im-Yeong Lee, Hyung-Woo Lee |
| 2002 | INDOCRYPT | New Identity Escrow Scheme for Anonymity Authentication. | Yong-Ho Lee, Im-Yeong Lee, Hyung-Woo Lee |
| 2001 | ICICS | A Digital Nominative Proxy Signature Scheme for Mobile Communication. | Hee-Un Park, Im-Yeong Lee |