What are digital documents used to prove ownership of a public key?

What are digital documents used to prove ownership of a public key?

• A. Safe browsing practices
• B. Certificates
• C. Valid
• D. Invalid

Answer: (B)

Digital certificates are used to prove ownership of a public key. They are issued by trusted authorities and bind a public key to the identity of the subject. A certificate includes the identity, the public key, the issuer, the validity period, and a digital signature from the issuer. This setup lets others verify that the public key actually belongs to the stated owner, because they can validate the issuer’s signature against a trusted root. The other options don’t represent documents that bind a key to an identity—safe browsing practices describe behaviors, and valid/invalid are just adjectives, not binding documents.

Digital certificates are used to prove ownership of a public key. They are issued by trusted authorities and bind a public key to the identity of the subject. A certificate includes the identity, the public key, the issuer, the validity period, and a digital signature from the issuer. This setup lets others verify that the public key actually belongs to the stated owner, because they can validate the issuer’s signature against a trusted root. The other options don’t represent documents that bind a key to an identity—safe browsing practices describe behaviors, and valid/invalid are just adjectives, not binding documents.