July 21, 2012

See also: Hashed ID, De-Identify

CIMM DEFINITION: A series of systems, processes and controls that remove personally identifiable data components from a data set  thereby eliminating or reducing the likelihood that certain characteristics or attributes, whether by themselves or in combination with other information, can be mapped to specific identifiable individuals.

NOTE – “Hashing and anonymization are not synonyms. Hashing is a form of anonymization which sometimes prevents tracking the same household from one day to the next, hence not providing reach/frequency metrics. Anonymization can be achieved with persistent anonymous ID codes where reach/frequency metrics are still available.” (Source: TRA)