Smart phone user authentication using audio channels. - Mun-Kyu Lee; Jin Bok Kim; Jeong Eun Song (ICCE, 2012)

3DPIN: Enhancing security with 3D display. - Mun-Kyu Lee; Jin Bok Kim; Matthew K. Franklin (GCCE, 2014)

Enhancing the Security of Personal Identification Numbers with Three-Dimensional Displays. - Mun-Kyu Lee; Jin Bok Kim; Matthew K. Franklin (Mob. Inf. Syst., 2016)