Exam CSSLP topic 3 question 84 discussion

Actual exam question from ISC's CSSLP

Question #: 84
Topic #: 3

[All CSSLP Questions]

Which of the following security models focuses on data confidentiality and controlled access to classified information?

A. Clark-Wilson model
B. Biba model
C. Take-Grant model
D. Bell-La Padula model

Show Suggested Answer

Suggested Answer: rules for the protection of data integrity. Answer: B is incorrect. The Biba model is a formal state transition system of computer security policy that describes a set 🗳️
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 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
Wilson model provides a foundation 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 integrity policy. The core of the model is based on the safety of a given computer system that follows specific rules. It shows that for specific systems the question of safety is decidable in linear time, which is in general undecidable. The model represents a system as directed graph, where vertices are either subjects or objects. The edges between them are labeled and the label indicates the rights that the source of the edge has over the destination. Two rights occur in every instance of the model: take and grant. They play a special role in the graph rewriting rules describing admissible changes of the graph.

by xymavu at April 4, 2025, 8:46 p.m.

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