const crypto = require('crypto');

module.exports = {
  // IP Anonymization
  anonymizeIP: (req, res, next) => {
    const ip = req.ip || '127.0.0.1';
    const salt = Math.floor(Date.now() / 3600000); // Hourly salt
    req.anonymizedIP = crypto.createHash('sha3-256')
      .update(ip + salt + process.env.IP_PEPPER)
      .digest('hex');
    next();
  },
  sanitizeInput: (req, res, next) => {
    // ...implement input sanitization if needed...
    next();
  }
};