Which protocol is primarily used for two-factor authentication in CyberArk?

The protocol primarily used for two-factor authentication in CyberArk is RSA. RSA, which stands for Rivest-Shamir-Adleman, is a widely recognized cryptographic system that supports secure data transmission and is frequently employed in two-factor authentication mechanisms. In this context, RSA works through a combination of something the user knows (such as a password) and something the user has (like an RSA SecurID token).

Using RSA for two-factor authentication enhances security by requiring users to provide two distinct forms of verification before accessing sensitive information or systems. This significantly reduces the risk of unauthorized access, as it mitigates the vulnerabilities associated with password-only authentication.

The other options listed, while related to security and identity management, do not serve primarily as a two-factor authentication protocol in the context of CyberArk. LDAP (Lightweight Directory Access Protocol) is used for directory services, SAML (Security Assertion Markup Language) facilitates single sign-on (SSO) and identity federation, and PKI (Public Key Infrastructure) involves managing digital certificates for encryption and authentication but does not specifically denote a two-factor authentication mechanism in the same way RSA does.