What are the potential security risks involved in directly passing data from an online system to a form on another server using PHP?

One potential security risk is that the data being passed from one server to another could be intercepted by malicious actors during transit. To mitigate this risk, it is recommended to encrypt the data before sending it and decrypt it on the receiving end. 

// Encrypt the data before sending it
$encrypted_data = openssl_encrypt($data, 'AES-256-CBC', 'secret_key', 0, 'initialization_vector');

// Send the encrypted data to the other server
// Example: using cURL
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, 'https://example.com/receive_data.php');
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, array('encrypted_data' => $encrypted_data));
curl_exec($ch);
curl_close($ch);

Keywords

SQL injection cross-site scripting data validation HTTPS CSRF protection

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