The Biba model axiom An object at one level of integrity is not permitted to modify (write to) an
object of a higher level of integrity (no write up) is called:

A.
The Constrained Integrity Axiom

B.
The Discretionary Integrity Axiom

C.
The Simple Integrity Axiom

D.
The * (star) Integrity Axiom

Explanation:
The correct answer is “The * (star) Integrity Axiom”. Answers a and d are distracters. Answer the
Simple Integrity Axiom states, Asubject at one level of integrity is not permitted to observe (read) an
object of lower integrity (no read down).