Fill in the blank: The authentication server is to authentication as the ticket granting service is to _____.

The authentication server is to authentication as the ticket granting service is to authorization.

Explanation:

In the context of network security and access control, the authentication server is responsible for verifying the identity of users or systems attempting to access a network or system. It ensures that the individuals are who they claim to be, usually through various means such as passwords, biometric data, or security tokens.

On the other hand, the ticket granting service (TGS) is a component of the Kerberos authentication protocol, which operates after the authentication server has verified a user's identity. While the TGS does not authenticate in the same sense, it is responsible for granting access tokens (tickets) that allow users to obtain services from other networked services. This process is generally referred to as authorization, as it determines the rights and permissions granted to the authenticated user. Thus, the blank should be filled with "authorization" to accurately reflect the relationship between these components in a security framework.