Revelation on demand

Nicolas Anciaux, Mehdi Benzine, Luc Bouganim, Philippe Pucheral, Dennis Shasha

Research output: Contribution to journalArticlepeer-review


Private data sometimes must be made public. A corporation may keep its customer sales data secret, but reveals totals by sector for marketing reasons. A hospital keeps individual patient data secret, but might reveal outcome information about the treatment of particular illnesses over time to support epidemiological studies. In these and many other situations, aggregate data or partial data is revealed, but other data remains private. Moreover, the aggregate data may depend not only on private data but on public data as well, e.g. commodity prices, general health statistics. Our GhostDB platform allows queries that combine private and public data, produce aggregates to data warehouses for OLAP purposes, and reveal exactly what is desired, neither more nor less. We call this functionality "revelation on demand".

Original languageEnglish (US)
Pages (from-to)5-28
Number of pages24
JournalDistributed and Parallel Databases
Issue number1-2
StatePublished - Apr 2009


  • Aggregate computation
  • Confidentiality and privacy
  • Data warehousing
  • Indexing model
  • Query processing
  • Secure device

ASJC Scopus subject areas

  • Software
  • Information Systems
  • Hardware and Architecture
  • Information Systems and Management


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