What are the potential pitfalls of storing sensitive user data in session variables in PHP?

Storing sensitive user data in session variables in PHP can be risky because sessions are stored on the server and can potentially be accessed by unauthorized users if not properly secured. To mitigate this risk, sensitive user data should be encrypted before storing it in session variables. 

<?php
session_start();

// Encrypt sensitive user data before storing it in session
$encryptedData = openssl_encrypt($sensitiveData, 'AES-256-CBC', 'secret_key', 0, '16charIV');

$_SESSION['encryptedData'] = $encryptedData;
?>

Keywords

security session variables sensitive data encryption data leakage

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