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)