Personal identifiable information (PII)

1. Any information about an individual maintained by an agency, including: information that can be used to distinguish or trace an individual’s identity, such as name, social security number, date and place of birth, mother’s maiden name, or biometric records; and any other information that can be linked to an individual, such as medical, educational, financial, and employment information.

Source: Election Terminology Glossary - Draft, National Institute of Standards and Technology (NIST),

2. Information that permits the identify of an individual to be derived and possibly used for identity theft. Voter registration systems may contain PII.

Source: Information Technology Terminology, U.S. Election Assistance Commission,

3. The information that permits the identity of an individual to be directly or indirectly inferred.

Source: Explore Terms: A Glossary of Common Cybersecurity Terminology, National Initiative for Cybersecurity Careers and Studies (NICCS),

4. Any representation of information that permits the identity of an individual to whom the information applies to be reasonably inferred by either direct or indirect means.

Source: Cyber Threats to Elections – A Lexicon, Cyber Threat Intelligence Integration Center & Office of the Director of National Intelligence,

5. A number (usually secret) assigned to an individual and used to confirm identity.

Source: Independent Panel on Internet Voting, British Columbia,