What does the simple integrity axiom mean in the Biba model?

The correct answer is B. No read down. The Biba model's simple integrity axiom states that a subject cannot read data from an object at a lower integrity level - 'no read down.' The rationale is that reading low-integrity (potentially corrupt or untrustworthy) data could compromise the integrity of a…

Submitted by neha2k· Apr 18, 2026Access Controls

Question

What does the simple integrity axiom mean in the Biba model?

Options

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

How the community answered

(14 responses)

B
86% (12)
C
7% (1)
D
7% (1)

Explanation

The Biba model's simple integrity axiom states that a subject cannot read data from an object at a lower integrity level - 'no read down.' The rationale is that reading low-integrity (potentially corrupt or untrustworthy) data could compromise the integrity of a higher-integrity subject. This complements the *-integrity axiom ('no write up'). Together they ensure that integrity levels are preserved: high-integrity processes are shielded from both reading untrustworthy input and writing to high-integrity objects from a compromised state.

Topics

#Biba Model#Integrity Models#Access Control Models

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