Guest Talk on Privacy and Security Issues

Title: Privacy and
Security issues in Published or Outsourced Databases


Speaker: Dimitris Sacharidis (Institute of the Mangement for Information Systems - IMIS Greece)




 




Abstract:




The concept of
k-anonymity has received considerable attention due to




the need of several
organizations to release microdata without




revealing the
identity of individuals. Standard anonymization




techniques assume the
existence of a public database that a malign




person may use to
breach privacy. Our work utilizes such public




knowledge to
construct anonymized databases that offer the same




anonymity guarantees
while having more utility.




 




In the outsourced
database model, a data owner publishes her database




through a third-party
server; i.e., the server hosts the data and




answers user queries
on behalf of the owner. Since the server may not




be trusted, or may be
compromised, users need a means to verify that




answers received are
both authentic and complete, i.e., that the




returned data have
not been tampered with, and that no qualifying




results have been
omitted. Our work focuses on indexing techniques




that guarantee
authenticity and completeness in both centralized and




distributed settings.