Access Control Methods

 ABAC, DAC, MAC, Role-BAC, Rule-BAC

ABAC (Attribute-Based Access Control)

The most fine-grained access control.

Access is based on a combination of subject and object attributes

• Operating system
• IP address
• Up-to-date patches
• Up-to-date antimalware
• Employee's identity
• Time of day
• Location
• Type of device

DAC (Discretionary Access Control)

• Based on the owner o the file or folder
• The owner decides who gets access and the type of access
• Windows, Linux, and UNIX use a DAC method

MAC (Mandatory Access Control)

• Each object is assigned a classification label
• Each subject is assigned a clearance level (such as Confidential, Secret, or Top Secret)
• A subject with the label "Secret" would be unable to access "Top Secret" data as it would be above its clearance level.
• Also based on "Need to know", in other words not everything will they have access to at its security level. 

RBAC (Role-Based Access Control)

• Based on your job function (role)
• Group-based security
• Group examples: Accounting, HR, IT, Sales. etc

RBAC (Rule-Based Access Control)

• System enforced rules
• Some rule triggers the access control
• Time of day 
• Conditional access is a form of rule-based access control
• UAC (User Account Control - Windows) and sudo - Linux are examples of conditional access