Shahrokh Saeednia Steve Kremer Olivier Markowitch An Efficient Strong Designated Verifier Signature Scheme. 40-54 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2971&spage=40 2003 conf/icisc/2003 ICISC db/conf/icisc/icisc2003.html#SaeedniaKM03