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Certificate Authority (CA)

Security

TLS (Transport Layer Security) Certificate Pinning HTTPS Man‑in‑the‑Middle Attack

A trusted party that helps prove websites are real.

Definition

A Certificate Authority issues certificates that help your browser confirm it’s really talking to the right website.

In plain English A trusted party that helps prove websites are real.

Why this matters

Why it matters: Without trust checks, attackers could impersonate websites and steal private information.

Example

Example: Your browser checks a certificate chain before showing a HTTPS lock icon.