Which of the following is NOT a method for securing user access in FortiGate?

Securing user access in FortiGate involves several methods that ensure only authorized users can access network resources. Local user accounts are utilized to create specific user identities with tied permissions, allowing fine-grained control over access. Multifactor authentication adds an additional layer of security by requiring more than just a password for user verification, making unauthorized access significantly harder. RADIUS authentication facilitates centralized network access control, allowing user credentials to be verified against a remote server, ensuring robustness in managing user access.

In contrast, encryption of IP addresses does not directly relate to securing user access. Instead, it pertains to protecting the data being transmitted over a network by securing the data itself rather than the user authentication process. Thus, while encryption is crucial for data integrity and confidentiality, it does not serve as a method for determining or controlling user access within the FortiGate environment.