Which security model is designed to maintain data integrity by preventing write operations from lower classification levels to higher classification levels?
Clark-Wilson Model
Bell-LaPadula Model
Biba Integrity Model
Brewer-Nash Model
The Biba Integrity Model prevents lower integrity subjects from writing to higher integrity objects, often described as "no write up". This model focuses on maintaining data integrity rather than confidentiality, which is the opposite approach of Bell-LaPadula (which focuses on confidentiality with its "no read up, no write down" principles). Biba was specifically designed to address the integrity concerns that Bell-LaPadula does not cover, ensuring that data at higher integrity levels cannot be corrupted by lower integrity entities.
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