On the Security of Multilevel Cryptosystems over Class Semigroups of Imaginary Quadratic Non-maximal Orders.

Yongtae Kim Chang Han Kim Taek-Young Youn On the Security of Multilevel Cryptosystems over Class Semigroups of Imaginary Quadratic Non-maximal Orders. 92-100 2006 conf/europki/2006 EuroPKI http://dx.doi.org/10.1007/11774716_8 db/conf/europki/europki2006.html#KimKY06