@InProceedings{pido,
  author =	 {Gang Liang and Sudarshan S. Chawathe},
  title =	 {Privacy-Preserving Inter-Database Operations},
  booktitle =	 {Proceedings of the Symposium on Intelligence and
                  Security Informatics (ISI)},
  year =	 2004,
  address =	 {Tucson, Arizona},
  month =	 jun,
  day =		 {10--11},
  series =	 LNCS,
  volume =       {3073},
  pages =	 {66--82}
}