Protecting an Application's Access to a Secured Server

I am trying to wrap my head around the ways an application can authenticate with a central service, to prove it is allowed to deliver information - At the same time, protecting this credential from users/sysadmins/attackers that would try to obtain it.

I'll use an RMM solution for an example:

There's a central server installed on a server accessible from the Internet, and a Software Agent installed on a managed endpoint at a customer. The RMM Central Server has a …

access application cybersecurity server