+A **Certificate Authority** (CA) is a trusted digital signer, issuing [Digital Certificates](/wiki/digital_certificate) that vouch for online identities. It acts as an anchor of trust, securing web communications and verifying authenticity, underpinning protocols like [TLS](/wiki/tls). This system builds confidence in the vast, open internet.
+## See also
+- [Public Key](/wiki/public_key)
+- [Digital Signature](/wiki/digital_signature)
+- [Cryptography](/wiki/cryptography)
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