Part 4 – Security Models and Access Control Models

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Description
This lesson covers security models and access control models. A security model dictates how a system will explore security policy. Three common security models covered in this unit include: • Bell-LaPadula: designed for US Government Systems that protect state secrets; it is designed to protect CONFIDENTIALITY. • Biba: designed to protect the INTEGRITY of the knowledge base. • Clark-Wilson: Don’t allow untrusted users to directly access your trusted resource of they’ll break them. Instead, form them to access resources through a trusted interface. Access Control models covered in this unit are: • Discretionary access control (DAC): security of an object is at the owner’s discretion. • Mandatory Access control (MAC): More secure than DAC as data owners cannot grant access • Role based access control (RBAC): The owner of an object does not control access. Each role has a set of fights and permission which cannot be changed unless a security administrator is involved.
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