diff --git a/backend/test_hash.php b/backend/test_hash.php
new file mode 100644
index 0000000..5004bc9
--- /dev/null
+++ b/backend/test_hash.php
@@ -0,0 +1,54 @@
+<?php
+require_once __DIR__ . '/core/bootstrap.php';
+$id = '34feffd3fa72d6bee56b'; // This is the driver ID from the logs
+$con = Database::get('main');
+$stmt = $con->prepare('
+    SELECT d.id, d.phone, d.national_number, d.email, d.password, c.year
+    FROM driver d
+    LEFT JOIN CarRegistration c ON c.driverID = d.id
+    WHERE d.id = :id
+    LIMIT 1
+');
+$stmt->execute([':id' => $id]);
+$driver = $stmt->fetch();
+$pepper = getenv('SECRET_KEY_HMAC');
+
+$res = ['driver' => $driver];
+
+$oldParts = [
+    $driver['id'],
+    $driver['phone'],
+];
+if (!empty($driver['national_number'])) {
+    $oldParts[] = $driver['national_number'];
+}
+if (!empty($driver['year']) && preg_match('/^\d{4}$/', $driver['year'])) {
+    $oldParts[] = $driver['year'];
+}
+$oldString = implode('|', $oldParts);
+$oldSecret = hash_hmac('sha256', $oldString, $pepper, true);
+
+$res['oldString'] = $oldString;
+$res['password_verify_old'] = password_verify($oldSecret, $driver['password']);
+
+$decPhone = !empty($driver['phone']) ? $encryptionHelper->decryptData($driver['phone']) : null;
+$decNat   = !empty($driver['national_number']) ? $encryptionHelper->decryptData($driver['national_number']) : null;
+
+$newParts = [
+    $driver['id'],
+    trim($decPhone),
+];
+if (!empty($decNat)) {
+    $newParts[] = trim($decNat);
+}
+if (!empty($driver['year']) && preg_match('/^\d{4}$/', $driver['year'])) {
+    $newParts[] = $driver['year'];
+}
+$newString = implode('|', $newParts);
+$newSecret = hash_hmac('sha256', $newString, $pepper, true);
+
+$res['newString'] = $newString;
+$res['password_verify_new'] = password_verify($newSecret, $driver['password']);
+$res['decPhone'] = $decPhone;
+
+echo json_encode($res);