1. A well specified message exchange process between a claimant and a verifier that enables the verifier to confirm the claimant's identity. 2. A defined sequence of messages between a Claimant and a Verifier that demonstrates that the Claimant has possession and control of a valid token to establish his/her identity, and optionally, demonstrates to the Claimant that he or she is communicating with the intended Verifier. Source: NIST SP 800-63-2
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1. A well specified message exchange process between a claimant and a verifier that enables the verifier to confirm the claimant's identity. 2. A defined sequence of messages between a Claimant and a Verifier that demonstrates that the Claimant has possession and control of a valid token to establish his/her identity, and optionally, demonstrates to the Claimant that he or she is communicating with the intended Verifier. Source: NIST SP 800-63-2
Cite this term
Election Security Glossary. (2026). Authentication Protocol. In Election Security Glossary. Retrieved August 21, 2026, from https://electionsecurityglossary.com/glossary/authentication-protocol
Sources
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High consensus
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Multi-source
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