Lan Nguyen Accumulators from Bilinear Pairings and Applications. 275-292 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3376&spage=275 2005 conf/ctrsa/2005 CT-RSA db/conf/ctrsa/ctrsa2005.html#Nguyen05