Security Best Practices

Follow these security best practices to ensure your authentication implementation is secure.

Token Storage

• Never store tokens in localStorage
• Use httpOnly cookies when possible
• Implement secure token refresh flows

PKCE Implementation

Always use PKCE for public clients:

const codeVerifier = generateRandomString();
const codeChallenge = await sha256(codeVerifier);

auth.loginWithRedirect({
  code_challenge: codeChallenge,
  code_challenge_method: 'S256'
});

API Security

• Always use HTTPS
• Validate tokens on every request
• Implement rate limiting

XSS Prevention

// Sanitize user input
const sanitized = DOMPurify.sanitize(userInput);

CSRF Protection

• Use SameSite cookies
• Implement CSRF tokens
• Validate Origin headers

Regular security audits and penetration testing are recommended.