Which email security solution uses its own digital certificates?

Which email security solution uses its own digital certificates?

• A. S/MIME
• B. SSL
• C. HTTPS
• D. PGP

Answer: (D)

PGP uses its own digital certificate system built around public keys and a web of trust rather than relying on a centralized PKI. In practice, you generate a key pair and share your public key, while others sign your key to attest your identity. This creates certificate-like credentials that are managed within PGP itself, without needing a central certificate authority. S/MIME, on the other hand, relies on X.509 certificates issued by trusted certificate authorities as part of a PKI, so it uses CA-backed certificates rather than PGP’s self-contained trust model. SSL and HTTPS are about securing transport channels (TLS) for web traffic, not about providing email encryption with its own certificate framework. So the option that uses its own digital certificates is PGP.

PGP uses its own digital certificate system built around public keys and a web of trust rather than relying on a centralized PKI. In practice, you generate a key pair and share your public key, while others sign your key to attest your identity. This creates certificate-like credentials that are managed within PGP itself, without needing a central certificate authority.

S/MIME, on the other hand, relies on X.509 certificates issued by trusted certificate authorities as part of a PKI, so it uses CA-backed certificates rather than PGP’s self-contained trust model. SSL and HTTPS are about securing transport channels (TLS) for web traffic, not about providing email encryption with its own certificate framework.

So the option that uses its own digital certificates is PGP.