Client Certificate

Noun · Security & Infosec

Definitions

  1. A digital certificate presented by a client to authenticate itself to a server, most commonly in mutual TLS setups. Client certificates are often used in enterprise, industrial, and service-to-service environments where strong device or workload identity is needed.

    In plain English: A certificate a client uses to prove its identity to a server.

    Example: "The API gateway required a client certificate in addition to application-level authorization headers."

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