Which of the following statements pertaining to the Bell-LaPadula is TRUE if you are NOT making use of the strong star property?

The correct answer is D. It allows "write up.". The Bell-LaPadula model enforces confidentiality with two core properties: (1) Simple Security Property - 'no read up' (a subject cannot read data at a higher classification level), and (2) Star (*) Property - 'no write down' (a subject cannot write data to a lower…

Submitted by jian89· Apr 18, 2026Access Controls

Question

Options

AIt allows "read up."
BIt addresses covert channels.
CIt addresses management of access controls.
DIt allows "write up."

How the community answered

(21 responses)

A
5% (1)
B
10% (2)
D
86% (18)

Explanation

The Bell-LaPadula model enforces confidentiality with two core properties: (1) Simple Security Property - 'no read up' (a subject cannot read data at a higher classification level), and (2) Star (*) Property - 'no write down' (a subject cannot write data to a lower classification level). The Strong Star Property additionally restricts writes to only the subject's exact level (no write up or down). Without the strong star property, the standard star property still permits writing to the same or higher levels - so 'write up' is allowed. Covert channels and management of access controls are not addressed by Bell-LaPadula.

Topics

#Bell-LaPadula Model#Access Control Models#Confidentiality Model#Star Property

Community Discussion

No community discussion yet for this question.

Full SSCP Practice