You work as an analyst for Tech Perfect Inc. You want to prevent information flow that may cause
a conflict of interest in your organization representing competing clients. Which of the following
security models will you use?

A.
Bell-LaPadula model

B.
Chinese Wall model

C.
Clark-Wilson model

D.
Biba model

Explanation:
The Chinese Wall Model is the basic security model developed by Brewer and
Nash. This model prevents information flow that may cause a conflict of interest in an organization
representing competing clients. The Chinese Wall Model provides both privacy and integrity for
security policy that describes a set of access control rules designed to ensure data integrity. Data
and subjects are grouped into ordered levels of integrity. The model is designed so that subjects
may not corrupt data in a level ranked higher than the subject, or be corrupted by data from a
for specifying and analyzing an integrity policy for a computing system. The model is primarily
concerned with formalizing the notion of information integrity. Information integrity is maintained by
preventing corruption of data items in a system due to either error or malicious intent. The model’s
enforcement and certification rules define data items and processes that provide the basis for an
incorrect. The Bell-La Padula Model is a state machine model used for enforcing access control in
government and military applications. The model is a formal state transition model of computer
security policy that describes a set of access control rules which use security labels on objects and
clearances for subjects. Security labels range from the most sensitive (e.g.,”Top Secret”), down to
the least sensitive (e.g., “Unclassified” or “Public”). The Bell-La Padula model focuses on data
confidentiality and controlled access to classified information, in contrast to the Biba Integrity
Model which describes rules for the protection of data integrity.