What is Authentication (AuthN)?

Authentication (AuthN) is the process of verifying the identity of users or systems before granting access to resources. This blog explores various AuthN methods like passwords, multi-factor authentication, and biometrics, and discusses the trade-offs of building in-house or using third-party providers. Authentication ensures security in applications by determining who (or what) is attempting to access a system. Different authentication methods include username and password, Multi-Factor Authentication (MFA), Single Sign-On (SSO) with an Identity Provider (IdP), Biometrics, QR codes, Magic links and One-Time Passcodes (OTP), and Tokens. Prioritizing passwordless authentication, implementing account lockout policies, and secure session management are some best practices for AuthN. It is recommended to use well-supported libraries and frameworks or managed authentication services provided by platforms like WorkOS instead of building your own authentication system.