Authorization in Cybersecurity

Understanding what users can do after they've been authenticated

Authorization determines what authenticated users can do within a system. While authentication verifies identity ("who you are"), authorization establishes permissions ("what you can do").

The Authentication vs. Authorization Distinction

Authentication

Verifies who a user is

Example: Checking ID card to enter a building

Happens before authorization

Uses passwords, biometrics, tokens

Authorization

Determines what a user can do

Example: Determining which rooms you can enter

Happens after authentication

Uses permissions, roles, policies

Key Purposes of Authorization

Real-World Examples

Healthcare System

In a hospital information system:

Nurses: Can view patient vitals and update care notes
Doctors: Can prescribe medication and modify treatment plans
Patients: Can view their own basic medical information but not doctor's notes
IT Staff: Can maintain the system but cannot access patient records

Corporate Finance System

In a company's accounting software:

Employees: Can submit expense reports
Managers: Can approve team expenses
Finance Team: Can process payments and view all financial data
Executives: Can view financial reports but not modify transactions

Learning Management System

In an educational platform:

Students: Can access course materials and submit assignments
Instructors: Can create content, grade work, and modify the course
Administrators: Can manage users and system settings

Authorization Mechanisms

Mechanism	Description	Example
Role-Based Access Control (RBAC)	Permissions based on user roles	Admin, Editor, Viewer roles in a content management system
Rule-Based Access Control	Permissions based on predefined rules	Allow access only during business hours
Attribute-Based Access Control (ABAC)	Permissions based on user attributes and context	Allow access based on department, location, and security clearance

Key Takeaways

Authorization determines what authenticated users are permitted to do within a system
It protects sensitive data by restricting access based on user roles and permissions
Authorization maintains system integrity by limiting critical changes to qualified personnel
It enhances user experience by tailoring accessible options and data to each user's role