What are the potential security risks of using static QR codes for authentication in a PHP application?

Using static QR codes for authentication in a PHP application can pose security risks as they can be easily copied and reused by malicious actors. To mitigate this risk, dynamic QR codes that change periodically or upon each use should be implemented to enhance security. 

// Generate a dynamic QR code using a unique token
$token = uniqid();
$qrCodeUrl = "https://api.qrserver.com/v1/create-qr-code/?data=" . $token;

// Store the token securely in the server-side session or database for validation
$_SESSION['qr_token'] = $token;

// Display the QR code image in the HTML
echo "<img src='$qrCodeUrl' alt='QR Code'>";

Keywords

security risks static QR codes authentication PHP application

Related Questions