A Proposal of a New Public Key Cryptosystem Using Matrices over a Ring. - Heajoung Yoo; Seokhie Hong; Sangjin Lee 002; Jong In Lim 001; Okyeon Yi; Maenghee Sung (ACISP, 2000)

Practical off-line authentication. - Heajoung Yoo; Seungchul Seo; Sangjin Lee 002; Jongin Lim 001 (Security and Watermarking of Multimedia Contents, 2002)