Which of the following would be the most appropriate way to protect data in transit?

SHA-256 is a cryptographic hash function used for generating fixed-size hash values from data inputs. While it provides data integrity and authenticity, it does not encrypt data in transit, making it unsuitable for securing communication channels. It is primarily used for verifying data integrity rather than protecting data during transmission.

SSL 3.0 is an outdated protocol for securing communications, which has known vulnerabilities that can be exploited by attackers. Although it was designed for secure data transmission, modern standards have since evolved, and SSL 3.0 is no longer considered safe for protecting data in transit. TLS 1.3 is a more secure and efficient alternative.

AES-256 is a symmetric encryption algorithm used to encrypt data at rest or during transmission. While it provides strong encryption, it does not address the broader aspects of secure communication protocols, such as authentication and session management, which are essential for protecting data in transit. TLS 1.3 incorporates AES encryption along with these essential features to ensure comprehensive security.