Explain the STRID model and list two of its benefit?

Please indicate the design principle that is implemented or violated by each of the following cases:

A$)$ The UNIX operating system does not apply access controls to the user root. That user can terminate any process and read, write, or delete any file. Thus, users who create backups can also delete files. The administrator account on Windows has the same powers.

B$)$ The ident protocol sends the user name associated with a process that has a TCP connection to a remote host. A mechanism on host A that allows access based on the results of an ident protocol result makes the assumption that the originating host is trustworthy. If host $B$ decides to attack host A$,$ it can connect and then send any identity it chooses in response to the ident request. This is an example of a mechanism making an incorrect assumption about the environment $($specifically$,$ that host B can be trusted$).$