diff --git a/main.py b/main.py
index 6212941..c6b65a3 100644
--- a/main.py
+++ b/main.py
@@ -21,10 +21,34 @@ sys.path.insert(0, BUNDLE_DIR)
 
 from PyQt6.QtWidgets import QApplication, QInputDialog, QMessageBox, QLineEdit
 
+import hashlib
+import platform
+import socket
+import uuid
+
 LICENSE_API = "https://vision.copydev.fr/api/license.php"
 LICENSE_FILE = os.path.join(BASE_DIR, ".license")
 
 
+def _get_machine_id():
+    """Generer un identifiant unique pour cette machine."""
+    raw = ""
+    try:
+        raw += platform.node()
+        raw += str(uuid.getnode())  # MAC address
+    except Exception:
+        raw += "unknown"
+    return hashlib.sha256(raw.encode()).hexdigest()[:32]
+
+
+def _get_hostname():
+    """Recuperer le nom NetBIOS / hostname."""
+    try:
+        return platform.node() or socket.gethostname()
+    except Exception:
+        return "inconnu"
+
+
 def _load_license_cache():
     """Charger le cache de licence local."""
     if not os.path.exists(LICENSE_FILE):
@@ -48,7 +72,9 @@ def _save_license_cache(data):
 def _check_license_online(key):
     """Verifier la licence aupres du serveur Vision."""
     try:
-        url = f"{LICENSE_API}?key={urllib.parse.quote(key)}"
+        mid = _get_machine_id()
+        hname = _get_hostname()
+        url = f"{LICENSE_API}?key={urllib.parse.quote(key)}&machine_id={urllib.parse.quote(mid)}&hostname={urllib.parse.quote(hname)}"
         req = urllib.request.Request(url, headers={"User-Agent": "CopydevImposingTool/1.0"})
         with urllib.request.urlopen(req, timeout=10) as resp:
             data = json.loads(resp.read().decode())