Which pair of technologies are commonly described as securing communications with public-key cryptography and digital certificates?

Which pair of technologies are commonly described as securing communications with public-key cryptography and digital certificates?

• A. Public Key Infrastructure
• B. Public Key Initiatives
• C. Private Key Integration
• D. Secure Key Exchange

Answer: (A)

Public-key cryptography and digital certificates are brought together by Public Key Infrastructure. PKI is the framework that creates, manages, distributes, stores, and revokes the keys and certificates that enable trusted communications. It relies on Certificate Authorities to issue digital certificates that bind a public key to a verified identity, with supporting components like Registration Authorities, certificate databases, and revocation mechanisms (such as certificate revocation lists or OCSP). This setup allows others to trust a public key, knowing it’s tied to a verified entity, which underpins secure TLS/HTTPS, email security, and digital signatures. The other options don’t describe a complete ecosystem for managing keys and certificates: one is not a recognized term, another suggests only a private-key concept, and the last refers to a general goal rather than the organized framework that ensures trust in public-key cryptography.

Public-key cryptography and digital certificates are brought together by Public Key Infrastructure. PKI is the framework that creates, manages, distributes, stores, and revokes the keys and certificates that enable trusted communications. It relies on Certificate Authorities to issue digital certificates that bind a public key to a verified identity, with supporting components like Registration Authorities, certificate databases, and revocation mechanisms (such as certificate revocation lists or OCSP). This setup allows others to trust a public key, knowing it’s tied to a verified entity, which underpins secure TLS/HTTPS, email security, and digital signatures. The other options don’t describe a complete ecosystem for managing keys and certificates: one is not a recognized term, another suggests only a private-key concept, and the last refers to a general goal rather than the organized framework that ensures trust in public-key cryptography.