What does the (star) integrity axiom mean in the Biba model?

The correct answer is D. No write up. The Biba model is the integrity counterpart to Bell-LaPadula. Its *-integrity axiom (star integrity axiom) states that a subject cannot write to an object at a higher integrity level - 'no write up.' This prevents a lower-integrity subject from corrupting high-integrity data…

Submitted by jordan8· Apr 18, 2026Access Controls

Question

What does the (star) integrity axiom mean in the Biba model?

Options

ANo read up
BNo write down
CNo read down
DNo write up

How the community answered

(22 responses)

B
5% (1)
C
5% (1)
D
91% (20)

Explanation

The Biba model is the integrity counterpart to Bell-LaPadula. Its *-integrity axiom (star integrity axiom) states that a subject cannot write to an object at a higher integrity level - 'no write up.' This prevents a lower-integrity subject from corrupting high-integrity data. The simple integrity axiom covers 'no read down' - a subject cannot read from a lower integrity object, preventing contamination of a subject's integrity by low-quality data. Biba's rules are the mirror image of Bell-LaPadula's, but for integrity rather than confidentiality.

Topics

#Security Models#Biba Model#Integrity#Access Control Axioms

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