Jeeyeon Kim Hyunjo Kwon Haeryong Park Seungjoo Kim Dongho Won An Improvement of VeriSign's Key Roaming Service Protocol. 281-288 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2722&spage=281 2003 conf/icwe/2003 ICWE db/conf/icwe/icwe2003.html#KimKPKW03