A secret mechanism that enables the implementation of the reverse function in a one-way function
is called a:

A.
View.

B.
Open door.

C.
Trap door.

D.
Data diode.

Explanation:
The correct answer is Trap door. Answer view refers to a mechanism in a database system that
restricts access to certain information within the database. The view implements the principle of
least privilege. Answer Open door is a distracter, and answer Data diode refers to a mechanism
usually in multilevel security systems that limits the flow of classified information to one direction.