What BellLaPadula model rule states that someone at one secu

What Bell-LaPadula model rule states that someone at one security level cannot write information to a lower security level?

A. Star * property

B. Simple security rule

C. Simple integrity property

D. Strong star rule

Solution

A. The star * property rule states that someone at one security level cannot write information to a lower security level. Answer B is incorrect because the simple security rule states that someone cannot read information at a higher security level. Answer C is incorrect because the simple integrity property deals with the Biba model, not Bell-LaPadula. Answer D is incorrect because it states that read and write privileges are valid only at the level at which the user resides.