What are the advantages and disadvantages of using session variables for sensitive data transfer in PHP?

When transferring sensitive data in PHP, using session variables can be advantageous because they are stored on the server-side and not exposed to the client. However, session variables can be vulnerable to session hijacking or fixation attacks if not properly secured. It is important to use secure coding practices, such as using HTTPS, encrypting sensitive data, and validating user input, to mitigate these risks. 

<?php
// Start a secure session
session_start();

// Store sensitive data in session variable
$_SESSION['sensitive_data'] = encryptSensitiveData($data);

// Retrieve sensitive data from session variable
$sensitiveData = decryptSensitiveData($_SESSION['sensitive_data']);

function encryptSensitiveData($data) {
    // Implement encryption logic here
    return $encryptedData;
}

function decryptSensitiveData($data) {
    // Implement decryption logic here
    return $decryptedData;
}
?>

Keywords

session variables sensitive data transfer advantages disadvantages

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