Authentication vs Authorization: Key Cloud Security Concepts Explained

Authentication and authorization are two distinct security processes that underpin access control in modern applications like Gmail, Netflix, and online banking. Authentication verifies a user's identity through credentials such as passwords, OTPs, or biometrics, while authorization determines what actions or resources that verified user is permitted to access. Common authentication methods include Multi-Factor Authentication (MFA) and OAuth, whereas authorization frameworks include Role-Based Access Control (RBAC) and cloud IAM policies. Security experts recommend applying the principle of least privilege, ensuring users receive only the permissions genuinely required for their role. Mistakes such as skipping MFA, reusing passwords, or granting blanket admin rights remain widespread vulnerabilities that significantly raise security risks.