Public-Key Cryptosystems Based on Class Semigroups of Imaginary Quadratic Non-maximal Orders.

Hwankoo Kim Sang-Jae Moon Public-Key Cryptosystems Based on Class Semigroups of Imaginary Quadratic Non-maximal Orders. 488-497 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2727&spage=488 2003 conf/acisp/2003 ACISP db/conf/acisp/acisp2003.html#KimM03