Which term refers to a security protocol that uses certificates to authenticate and encrypt web communications?

Which term refers to a security protocol that uses certificates to authenticate and encrypt web communications?

• A. Cipher suite
• B. NFC
• C. Ad hoc network
• D. Transport Layer Security (TLS)

Answer: (C)

TLS, or Transport Layer Security, is the security protocol that uses certificates to authenticate endpoints and encrypt web traffic. In a TLS handshake, the server presents a digital certificate (commonly an X.509 certificate) issued by a trusted certificate authority to prove its identity. The client verifies that certificate chain, then uses public-key cryptography to establish a shared symmetric session key. With that key, subsequent data is encrypted for confidentiality and integrity (often using an AEAD cipher). This is the mechanism that secures HTTPS connections, making sure you’re talking to the legitimate server and that the content cannot be read or tampered with in transit. Cipher suite describes the set of algorithms (key exchange, authentication, encryption, and integrity) that TLS may use, but it is not the protocol itself. NFC is a short-range wireless technology, not a web-security protocol. An ad hoc network refers to a type of wireless network topology, not a security protocol for web communications.

TLS, or Transport Layer Security, is the security protocol that uses certificates to authenticate endpoints and encrypt web traffic. In a TLS handshake, the server presents a digital certificate (commonly an X.509 certificate) issued by a trusted certificate authority to prove its identity. The client verifies that certificate chain, then uses public-key cryptography to establish a shared symmetric session key. With that key, subsequent data is encrypted for confidentiality and integrity (often using an AEAD cipher). This is the mechanism that secures HTTPS connections, making sure you’re talking to the legitimate server and that the content cannot be read or tampered with in transit.

Cipher suite describes the set of algorithms (key exchange, authentication, encryption, and integrity) that TLS may use, but it is not the protocol itself. NFC is a short-range wireless technology, not a web-security protocol. An ad hoc network refers to a type of wireless network topology, not a security protocol for web communications.