Correct Answer: C
Explanation/Reference:
Explanation:
With the Clark-Wilson model, users are unable to modify critical data (CDI) directly. Users have to be authenticated to a piece of software, and the software procedures (TPs) will carry out the operations on behalf of the user.
Incorrect Answers:
A: The Biba model allows access to sensitive data based on a lattice of integrity levels.
B: The Bell-LaPadula model allows access to sensitive data based on a lattice of security levels.
D: The information flow model, on which both the Bell-LaPadula and Biba models are based, allows direct access to data.
References:
Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, 2013, pp. 369-378
https://en.wikipedia.org/wiki/Clark-Wilson_model