Jane is working as a security professional at CyberSol Inc. She was tasked with ensuring the authentication and integrity of messages being transmitted in the corporate network. To encrypt the message

Zero trust is a network security philosophy based on continuous verification of all users and devices regardless of location, not an encryption model involving public key rings.

TLS is a protocol that secures transport-layer communications using certificates issued by trusted certificate authorities, not a user-maintained decentralized key ring model.

SSL is the deprecated predecessor to TLS and similarly relies on certificate authority-issued certificates rather than a decentralized web of individually trusted public keys.

The Web of Trust (WOT) model, introduced with PGP, allows each user to maintain a keyring of other users' public keys. Encryption is performed using the recipient's public key, and only the recipient can decrypt the message using the corresponding private key. This decentralized ring-of-keys model directly matches the scenario described, distinguishing it from PKI-based systems that rely on centralized certificate authorities.