PSM for SSH supports various authentication methods, specifically focusing on secure and verified access mechanisms. The supported methods include:

RADIUS (D): Remote Authentication Dial-In User Service (RADIUS) is a networking protocol that provides centralized Authentication, Authorization, and Accounting management for users who connect and use a network service. PSM for SSH utilizes RADIUS to authenticate SSH sessions, which adds an additional layer of security by centralizing authentication requests to a RADIUS server.

Client Authentication Certificate (E): This method uses certificates for authentication, where a client presents a certificate that the server verifies against known trusted certificates. This type of authentication is highly secure as it ensures that both parties involved in the communication are precisely who they claim to be, making it suitable for environments that require stringent security measures.

These methods provide robust security options for SSH sessions managed through CyberArk's PSM, ensuring that only authorized users can access critical systems.