Which of the following statements best describes a certification authority?

Question

Options

• AA certification authority is a technique to authenticate digital documents by using computer
• BA certification authority is a type of encryption that uses a public key and a private key pair for
• CA certification authority is an entity that issues digital certificates for use by other parties.
• DA certification authority is a type of encryption that uses a single key to encrypt and decrypt

• A
  2% (1)
• C
  95% (52)
• D
  4% (2)

Explanation

Option C is correct because a Certification Authority (CA) is a trusted third-party organization (like DigiCert or Let's Encrypt) that issues digital certificates, which bind a public key to an identity and allow others to verify that identity online.

• A describes a digital signature, not a CA - signing is the technique; the CA is the entity behind it.
• B describes asymmetric (public-key) encryption - that's the cryptographic method CAs rely on, but it's not what a CA is.
• D describes symmetric encryption (single shared key) - a completely different concept unrelated to CAs.

Memory tip: Think of a CA like a passport office - it doesn't travel for you, it just issues the credential that proves who you are. "Authority" = the issuer, not the technique.

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