In authentication, the party trying to provide its identity to the other party is called the

• A. Applicant
• B. Prover
• C. Claimant
• D. Requester

Answer: (B)

In authentication, the party that proves its identity to the other party is called the prover. The prover presents credentials or a cryptographic proof—like a password, a digital certificate, or a signed token—to convince the verifier that it genuinely is who it claims to be. The verifier then checks that proof and decides whether to grant access.

Other terms don't fit the specific role in authentication. An applicant is someone applying for a job or service, not the cryptographic proof process. A claimant is a person asserting something in a legal or insurance context. A requester is a generic term for someone asking for something, but it doesn’t capture the act of proving identity in an authentication exchange.

So, the party that provides proof of identity is the prover.