Access Control Fundamentals: Authentication, Authorization, and Least Privilege

In an era of constant security threats, securing access to your systems and data is more critical than ever. Understanding how to verify identities and restrict permissions correctly forms the foundation of all modern cybersecurity defense strategies. This text-based course guides you through the essential concepts of authentication, authorization, and the principle of least privilege, giving you the practical knowledge to design and evaluate secure access control models. What you'll learn: - Understand the fundamental differences between authentication (verifying identity) and authorization (granting permissions). - Explore modern authentication mechanisms, including multi-factor authentication (MFA) and passwordless strategies. - Analyze modern authorization frameworks such as OAuth 2.0 and OpenID Connect for secure API and application access. - Design access control structures using Role-Based Access Control (RBAC) and Attribute-Based Access Control (ABAC). - Apply the principle of least privilege and Zero Trust security concepts to minimize your system's attack surface. - Identify and remediate privilege creep through regular access reviews and auditing practices. You will start by learning core definitions and security terminology before exploring real-world access control patterns, token-based authentication, and modern security architectures. This course is designed for absolute beginners, software developers, system administrators, and aspiring security professionals with no prior cybersecurity experience. Start reading today to build a strong foundation in modern access control and secure your digital assets.