Markus Bläser Andreas Jakoby Maciej Liskiewicz Bodo Manthey Privacy in Non-private Environments. 137-151 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3329&spage=137 2004 conf/asiacrypt/2004 ASIACRYPT db/conf/asiacrypt/asiacrypt2004.html#BlaserJLM04