Which elements are used to verify the identity of the source by binding a public key to source information?

Which elements are used to verify the identity of the source by binding a public key to source information?

• A. Certificates
• B. PKI
• C. Hashes
• D. Encryption

Answer: (A)

Binding a public key to source information to verify identity is accomplished with a digital certificate. A certificate is issued by a trusted certificate authority and contains the entity’s identity, the public key, and the CA’s digital signature. By validating that signature against the CA’s public key, you confirm that the public key indeed belongs to the stated entity. PKI provides the framework to issue and manage these certificates, but the binding itself lives in the certificate. Hashes are used to create a data digest for signatures (ensuring integrity), not to bind identity on their own, and encryption protects confidentiality rather than establishing who a key belongs to.

Binding a public key to source information to verify identity is accomplished with a digital certificate. A certificate is issued by a trusted certificate authority and contains the entity’s identity, the public key, and the CA’s digital signature. By validating that signature against the CA’s public key, you confirm that the public key indeed belongs to the stated entity. PKI provides the framework to issue and manage these certificates, but the binding itself lives in the certificate. Hashes are used to create a data digest for signatures (ensuring integrity), not to bind identity on their own, and encryption protects confidentiality rather than establishing who a key belongs to.