chapter  9
18 Pages

Anonymizing Sequential Releases with New Attributes

An organization makes a new release as new information becomes available, releases a tailored view for each data request, or releases sensitive information and identifying information separately. The availability of related releases sharpens the identification of individuals by a global quasi-identifier consisting of attributes from related releases. Since it is not an option to anonymize previously released data, the current release must be anonymized to ensure that a global quasi-identifier is not effective for identification.