diff --git a/chat/src/main/java/rtgre/chat/ChatController.java b/chat/src/main/java/rtgre/chat/ChatController.java
index 4ea8062..d14a9e9 100644
--- a/chat/src/main/java/rtgre/chat/ChatController.java
+++ b/chat/src/main/java/rtgre/chat/ChatController.java
@@ -163,6 +163,7 @@ public class ChatController implements Initializable {
                 initContactListView();
                 initPostListView();
                 this.statusLabel.setText("Connected to %s@%s:%s".formatted(this.contact.getLogin(), host, port));
+                client.sendAuthEvent(contact);
             } catch (IOException e) {
                 new Alert(Alert.AlertType.ERROR, "Erreur de connexion").showAndWait();
                 connectionButton.setSelected(false);
diff --git a/chat/src/main/java/rtgre/chat/net/ChatClient.java b/chat/src/main/java/rtgre/chat/net/ChatClient.java
index 009ffb6..b7b1571 100644
--- a/chat/src/main/java/rtgre/chat/net/ChatClient.java
+++ b/chat/src/main/java/rtgre/chat/net/ChatClient.java
@@ -1,8 +1,13 @@
 package rtgre.chat.net;
 
+import org.json.JSONObject;
 import rtgre.chat.ChatController;
+import rtgre.modeles.Contact;
+import rtgre.modeles.Event;
 
+import java.io.BufferedReader;
 import java.io.IOException;
+import java.io.InputStreamReader;
 import java.util.logging.Logger;
 
 import static rtgre.chat.ChatApplication.LOGGER;
@@ -26,6 +31,32 @@ public class ChatClient extends ClientTCP {
         this.listener = listener;
     }
 
+
+
+    public void sendEvent(Event event) {
+        connected = true;
+        try {
+            String message = event.toJson();
+            if (message == null) { // fin du flux stdIn
+                message = END_MESSAGE;
+            }
+            System.out.println(BLUE + "Envoi: " + message + RST);
+            this.send(message);
+            if (END_MESSAGE.equals(message)) {
+                connected = false;
+            }
+        } catch (IOException e) {
+            LOGGER.severe(e.toString());
+            connected = false;
+        }
+    }
+
+    public void sendAuthEvent(Contact contact) {
+        Event authEvent = new Event(Event.AUTH, new JSONObject().put("login", contact.getLogin()));
+        sendEvent(authEvent);
+    }
+
+
     @Override
     public void receiveLoop() {
         LOGGER.info(RED + "Boucle de réception de messages..." + RST);
diff --git a/chat/src/main/java/rtgre/server/ChatServer.java b/chat/src/main/java/rtgre/server/ChatServer.java
index 957765e..a342590 100644
--- a/chat/src/main/java/rtgre/server/ChatServer.java
+++ b/chat/src/main/java/rtgre/server/ChatServer.java
@@ -2,6 +2,7 @@ package rtgre.server;
 
 import org.json.JSONException;
 import org.json.JSONObject;
+import rtgre.modeles.Contact;
 import rtgre.modeles.ContactMap;
 import rtgre.modeles.Event;
 
@@ -101,7 +102,7 @@ public class ChatServer {
      */
     private void handleNewClient(Socket sock) throws IOException {
         ChatClientHandler client = new ChatClientHandler(sock);
-        Thread clientLoop = new Thread(client::echoLoop);
+        Thread clientLoop = new Thread(client::eventReceiveLoop);
         clientLoop.start();
         clientList.add(client);
         LOGGER.fine("Ajout du client [%s] dans la liste (%d clients connectés)"
@@ -181,9 +182,8 @@ public class ChatServer {
                         break;
                     }
                     LOGGER.info("[%s] Réception de : %s".formatted(ipPort, message));
-                    LOGGER.info("[%s] Envoi de : %s".formatted(ipPort, message));
                     try {
-                        if (handleEvent(message)) {
+                        if (!handleEvent(message)) {
                             break;
                         }
                     } catch (Exception e) {
@@ -201,23 +201,33 @@ public class ChatServer {
             switch (event.getType()) {
                 case Event.AUTH:
                     doLogin(event.getContent());
-                    return false;
-                default:
+                    LOGGER.finest("Login successful");
                     return true;
+                default:
+                    LOGGER.warning("Unhandled event type: " + event.getType());
+                    return false;
             }
         }
 
         private void doLogin(JSONObject content) {
             String login = content.getString("login");
-            if (login.equals("")) {
+            if (login.isEmpty()) {
+                LOGGER.warning("Aucun login fourni");
                 throw new JSONException("Aucun login fourni");
             } else if (!contactMap.containsKey(login)) {
+                LOGGER.warning("Login non-authorisé");
                 throw new IllegalStateException("Login non-authorisé");
             } else {
+                LOGGER.info("Connexion de " + login);
                 contactMap.getContact(login).setConnected(true);
             }
         }
 
+        public ChatClientHandler findClient(Contact contact) {
+            String login = contact.getLogin();
+            Contact contactRes = contactMap.get()
+        }
+
         public void send(String message) throws IOException {
             LOGGER.finest("send: %s".formatted(message));
             out.println(message);
@@ -247,7 +257,7 @@ public class ChatServer {
 
         public String receive() throws IOException {
             String message = in.readLine();
-            LOGGER.finest("receive: %s".formatted(message));
+            LOGGER.info("receive: %s".formatted(message));
             if (message == null) {
                 throw new IOException("End of the stream has been reached");
             }