Ming Yao Matthew Henricksen Ernest Foo Ed Dawson Offer Privacy in Mobile Agents Using Conditionally Anonymous Digital Signatures. 132-141 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3184&spage=132 2004 conf/trustbus/2004 TrustBus db/conf/trustbus/trustbus2004.html#YaoHFD04