A digital certificate serves to bind a public key to the identity information by what process?

A digital certificate serves to bind a public key to the identity information by what process?

• A. Encrypts data for secure transmission
• B. Verifies identities of users
• C. Stores private keys securely
• D. Binds a public key to the identity information via a certificate issued by a Certificate Authority

Answer: (D)

Digital certificates bind a public key to identity information through a certificate issued and signed by a trusted Certificate Authority. The certificate includes the entity’s identity details and their public key, plus a digital signature created with the CA’s private key. When someone receives the certificate, they verify the CA’s signature with the CA’s public key to confirm that the public key truly belongs to the claimed identity. This trust in the CA is what makes the binding reliable within PKI. The other options describe related tasks—encrypting data, authenticating users, or storing private keys—but they do not establish the verified link between a key and a person or organization.

Digital certificates bind a public key to identity information through a certificate issued and signed by a trusted Certificate Authority. The certificate includes the entity’s identity details and their public key, plus a digital signature created with the CA’s private key. When someone receives the certificate, they verify the CA’s signature with the CA’s public key to confirm that the public key truly belongs to the claimed identity. This trust in the CA is what makes the binding reliable within PKI. The other options describe related tasks—encrypting data, authenticating users, or storing private keys—but they do not establish the verified link between a key and a person or organization.