RBAC vs. ABAC: How to structure secure access control policies in your applications
Understand the differences between role-based access control (RBAC) and attribute-based access control (ABAC) to accurately limit privileges in your B2B systems.
#RBAC vs. ABAC: How to structure secure access control policies in your applications
In secure software development and corporate web platforms, defining who can view, create, edit, or delete sensitive information is one of the most critical logical system architecture decisions. An error in access management configuration (incorrect authorization) can lead to serious data breach incidents.
To implement robust identity and access management (IAM) policies, software engineers primarily use two access control models: RBAC and ABAC.
RBAC (Role-Based Access Control)
Role-based access control is the most widespread standard due to its simplicity of design and administration. It consists of defining groups of logical privileges associated with specific work roles in the company.
- The flow: Read/write permissions on database tables are assigned to the 'Editor' role. Subsequently, the systems administrator associates the employee Juan with the 'Editor' role, automatically inheriting his privileges.
- Advantage: It is easy to program, audit and maintain in organizations with fixed hierarchical structures.
- Disadvantage: Lacks contextual flexibility. If you need to prohibit Juan from using his 'Editor' permissions when he is traveling abroad or after hours, the traditional RBAC model does not allow this directly.
ABAC (Attribute-Based Access Control)
Attribute-based access control overcomes the limitations of RBAC by analyzing logical variables in real time during the query. Authorization is evaluated by policies based on four categories of attributes:
- Subject (User) Attributes: Position, seniority, work department.
- Object (Resource) Attributes: File classification (confidential, public), format, creator.
- Action Attributes: Create, Read, Update, Delete (
CRUD). - Environment Attributes: Time of day, connection IP address, country of origin of the request.
With ABAC you can define advanced policies: 'Grant write permissions to confidential files only if the user belongs to the engineering department, uses a certified corporate device with local IP, and performs the action between 9:00 and 18:00.'
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