Certified Information Systems Security Professional (CISSP) Practice Exam 2025 – All-in-One Guide to Mastering Your Certification!

The Biba model is specifically designed to maintain data integrity, which is the accuracy and consistency of data over its lifecycle. The model focuses on preventing unauthorized users from modifying data and ensuring that users do not degrade the integrity of information. This is accomplished through its access control policies, which dictate how data can be modified and by whom.

The essence of the integrity focus in the Biba model is encapsulated in its rules, which prohibit users from writing data at a higher integrity level (prevention of "write up") and allow them to read data at a lower integrity level (permitting "read down"). This approach ensures that users cannot compromise the integrity of the information they are allowed to access, thus protecting the system from integrity violations.

In contrast, approaches focusing on confidentiality, secure communication, or user validation do not specifically address the direct safeguarding of data from unauthorized alterations, which is the primary concern of the Biba model. These elements may be important for a comprehensive security framework but do not align with the specific integrity-centric goals of the Biba model.