Research, select and describe, in your view, the best Security Model found

Expert Solution

Answer:- the best security model is

Bell-LaPadula

This Model was invented by Scientists David Elliot Bell and Leonard .J. LaPadula.Thus this model is called the Bell-LaPadula Model. This is used to maintain the Confidentiality of Security. Here, the classification of Subjects(Users) and Objects(Files) are organized in a non-discretionary fashion, with respect to different layers of secrecy.

It has mainly 3 Rules:

SIMPLE CONFIDENTIALITY RULE: Simple Confidentiality Rule states that the Subject can only Read the files on the Same Layer of Secrecy and the Lower Layer of Secrecy but not the Upper Layer of Secrecy, due to which we call this rule as NO READ-UP
STAR CONFIDENTIALITY RULE: Star Confidentiality Rule states that the Subject can only Write the files on the Same Layer of Secrecy and the Upper Layer of Secrecy but not the Lower Layer of Secrecy, due to which we call this rule as NO WRITE-DOWN
STRONG STAR CONFIDENTIALITY RULE: Stong Star Confidentiality Rule is highly secured and strongest which states that the Subject can Read and Write the files on the Same Layer of Secrecy only and not the Upper Layer of Secrecy or the Lower Layer of Secrecy, due to which we call this rule as NO READ WRITE UP DOWN

The Bell-LaPadula Confidentiality Model is a state machine–based multilevel security policy. The model was originally designed for military applications. State machine models define states with current permissions and current instances of subjects accessing the objects. The security of the system is satisfied by the fact that the system transitions from one secure state to the other with no failures.

The model uses a layered classification scheme for subjects and a layered categorization scheme for objects. The classification level of the objects and the access rights of the subjects determine which subject will have authorized access to which object. This layered structure forms a lattice for manipulating access.

The Bell-LaPadula Confidentiality Model is a static model, which assumes static states. It implements mandatory access control (MAC) and discretionary access control (DAC)

venereology answered 1 year ago

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