Philippe Golle Jessica Staddon Brent R. Waters Secure Conjunctive Keyword Search over Encrypted Data. 31-45 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3089&spage=31 2004 conf/acns/2004 ACNS db/conf/acns/acns2004.html#GolleSW04