A _________ is an information path that is not normally used for communication within a computer system. It is not protected by the any of the systems security mechanisms.

A Trojaned program is a type of malicious software disguised as legitimate, not an information path.

A backdoor is a secret method of bypassing normal authentication, not an information path itself.

A covert channel exploits system resources or operations not intended for communication to secretly transfer information between processes or users, bypassing security policies.

A hijacked session is when an attacker takes over an authenticated user's active session, which is an attack technique, not a type of information path.

"Back-path" is not a standard computer security term for an unprotected information path.