function preventBruteForce(attempts: number, ip: string): 
  boolean {
  // Rate limiting and captcha requirements
  if (attempts > 3) {
    // Require captcha after 3 failed attempts
    return true;
  }
  
  // Check for suspicious activity patterns
  const isSuspicious = checkIpReputation(ip) || 
    detectAutomatedRequests();
    
  return isSuspicious;
}

async validateCaptcha(userInput: string, token: string): 
  Promise<{valid: boolean}> {
  // Validate user's captcha input
  return await securityProvider.verifyCaptcha(
    userInput, token
  );
}