Authentication Methods
- Username/password: Traditional, requires secure implementation
- Social login: OAuth with Google, Apple, etc.
- Passwordless: Magic links, WebAuthn
- Multi-factor authentication (MFA)
- Single Sign-On (SSO)
Password Security
- Secure hashing (bcrypt, Argon2)
- Password strength requirements
- Breach detection (HaveIBeenPwned)
- Rate limiting and lockouts
- Secure password reset flows
OAuth and Social Login
Multi-Factor Authentication
- SMS/email codes (less secure but accessible)
- Authenticator apps (TOTP)
- Hardware keys (WebAuthn/FIDO2)
- Biometrics (fingerprint, face)
- Push notifications
Authentication Platforms
- Auth0/Okta: Enterprise-grade identity
- Clerk: Modern, developer-friendly
- Firebase Auth: Google ecosystem
- Supabase Auth: Open-source option
- NextAuth.js: Self-hosted for Next.js
Session Management
Conclusion
Key Takeaways
- 1Auth platforms are generally better than building custom
- 2Password security requires proper hashing and protection
- 3OAuth/social login reduces friction and often improves security
- 4MFA significantly increases security
- 5Session management must be handled securely