Jean Monnerat Serge Vaudenay Generic Homomorphic Undeniable Signatures. 354-371 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3329&spage=354 2004 conf/asiacrypt/2004 ASIACRYPT db/conf/asiacrypt/asiacrypt2004.html#MonneratV04