Cybersecurity

Secure Authentication: Best Practices for Modern Applications

Essential authentication patterns and security practices every development team should implement.

HanuCode Security Team6 min read
Cybersecurity

Introduction

Authentication is the gateway to your application. Getting it wrong exposes your users and your business to significant risk.

Password Security

  • Enforce minimum password complexity requirements
  • Use bcrypt or Argon2 for password hashing
  • Implement account lockout after failed attempts
  • Never store passwords in plain text

    • Multi-Factor Authentication

    MFA significantly reduces account compromise risk:

  • Support TOTP authenticator apps
  • Offer SMS/email as backup (with awareness of limitations)
  • Implement WebAuthn/FIDO2 where possible
  • Make MFA enrollment easy but not mandatory initially

    • Session Management

  • Use secure, HttpOnly cookies for session tokens
  • Implement proper session expiration and renewal
  • Invalidate sessions on password change
  • Support remote session revocation

    • OAuth and SSO

    For enterprise applications:

  • Support SAML 2.0 and OpenID Connect
  • Implement proper token validation
  • Handle token refresh securely
  • Map external identities to internal roles

    • Conclusion

    Security is not a feature you add later—it must be designed into your authentication system from the beginning.

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