Authentication and authorization are two security measures that protect companies and users from unwanted cyberattacks by verifying identity and granting access to sensitive information, respectively. Authentication validates a user's identity before accessing a network or account, while authorization approves or denies requests to access specific data. Common methods for authentication include basic authentication, two-factor authentication, mobile authentication, and silent network authentication. Authorization has two common types: role-based access control (RBAC) and attribute-based access control (ABAC), which rely on user roles and attributes to grant permission. The main difference between authentication and authorization is that the former authenticates a person's identity before allowing successful login, while the latter authorizes their ability to access specific resources. Understanding the differences between these two security measures can help organizations determine which solutions to implement to protect private resources from cyber threats.