personal identifier

Personal Identifiers (PID) are a subset of personally identifiable information (PII) data elements, which identify an individual and can permit another person {{Cite web|date=2017-02-14|title=Guide to Identifying Personally Identifiable Information (PII)|url=https://www.technology.pitt.edu/help-desk/how-to-documents/guide-identifying-personally-identifiable-information-pii|access-date=2020-12-06|website=www.technology.pitt.edu|language=en}} PIIs include direct identifiers (name, social security number) and indirect identifiers (race, ethnicity, age).{{Cite web |title=What Is Personally Identifiable Information? |url=https://www.cdc.gov/nchs/training/confidentiality/training/page581.html |access-date=2024-03-14 |website=www.cdc.gov}}

Identifiers can be sensitive and non-sensitive, depending on whether it is a direct identifier that is uniquely associated with a person or a quasi-identifier that is not unique. A quasi-identifier cannot pin down an individual alone - it has to be combined with other identifiers.{{Cite web |last=University |first=Utah State |title=Sensitive Data {{!}} Research Data Management |url=https://radaris.com/ |access-date=2023-04-11 |website=library.usu.edu |language=en}}{{Cite web |title=Personally Identifiable Information (PII) |url=https://www.investopedia.com/terms/p/personally-identifiable-information-pii.asp |access-date=2022-09-07 |website=Investopedia |language=en}}