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), https://pages.nist.gov/ElectionGlossary/
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, https://www.eac.gov/documents/2017/09/21/information-technology-terminology-security
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), https://niccs.us-cert.gov/about-niccs/glossary
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, https://www.dni.gov/files/CTIIC/documents/CTIIC_2018_Lexicon_without_banner_small_file_for_Post.pdf
5. A number (usually secret) assigned to an individual and used to confirm identity.
Source: Independent Panel on Internet Voting, British Columbia, https://elections.bc.ca/docs/recommendations-report.pdf