To enhance security for RADIUS, how should Brian implement encryption?

Implementing RADIUS over TCP using TLS significantly enhances the security of RADIUS communications. RADIUS, by default, uses User Datagram Protocol (UDP), which does not provide built-in protections for data integrity or confidentiality. By transitioning to TCP and adding Transport Layer Security (TLS), Brian would be leveraging a protocol that offers encryption, ensuring that the data transmitted between clients and RADIUS servers is protected from eavesdropping and man-in-the-middle attacks.

Encrypting the RADIUS traffic with TLS means that sensitive information, such as usernames and passwords, will be securely transmitted, making it much more difficult for unauthorized parties to intercept or manipulate this data. This added layer of encryption aligns with best practices in identity and access management, where maintaining confidentiality of authentication credentials is critical for overall system security.

While other choices might seem related to security, they do not offer the same level of encryption or do not enhance RADIUS security adequately. For example, RADIUS over UDP remains vulnerable due to its lack of inherent security mechanisms, and IPsec, while a strong form of encryption, might not be practical for all environments. Enabling WPA-2 encryption pertains more to wireless security than directly improving RADIUS security. Choosing to implement RADIUS over TCP using TLS provides a