SangCheol Hwang Dong Hoon Lee 0002 Daewan Han Jae-Cheol Ryou Vulnerability of a Mobile Payment System Proposed at WISA 2002. 278-285 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3325&spage=278 2004 conf/wisa/2004 WISA db/conf/wisa/wisa2004.html#Hwang0HR04