diff --git a/src/main/java/acq/acq/src/Main.java b/src/main/java/acq/acq/src/Main.java
index 626968a..cb11032 100644
--- a/src/main/java/acq/acq/src/Main.java
+++ b/src/main/java/acq/acq/src/Main.java
@@ -1,7 +1,50 @@
 package acq.acq.src;
+// File: AcqClient.java
+import javax.net.ssl.*;
+import java.io.*;
+import java.security.KeyStore;
 
 public class Main {
-    public static void main(String[] args) {
-        
+    public static void main(String[] args) throws Exception {
+        String host = "localhost";
+        int port = 8443;
+
+        // If client needs to present cert (mTLS)
+        String keystorePath = "assets/certs/acq.p12";
+        char[] keystorePass = "hepl".toCharArray();
+
+        // Truststore to trust the server's CA
+        String truststorePath = "assets/certs/acq-trust.jks";
+        char[] truststorePass = "heplhepl".toCharArray();
+
+        KeyStore ks = KeyStore.getInstance("PKCS12");
+        try (FileInputStream fis = new FileInputStream(keystorePath)) {
+            ks.load(fis, keystorePass);
+        }
+        KeyManagerFactory kmf = KeyManagerFactory.getInstance("SunX509");
+        kmf.init(ks, keystorePass);
+
+        KeyStore ts = KeyStore.getInstance("JKS");
+        try (FileInputStream fis = new FileInputStream(truststorePath)) {
+            ts.load(fis, truststorePass);
+        }
+        TrustManagerFactory tmf = TrustManagerFactory.getInstance("SunX509");
+        tmf.init(ts);
+
+        SSLContext ctx = SSLContext.getInstance("TLS");
+        ctx.init(kmf.getKeyManagers(), tmf.getTrustManagers(), null);
+
+        SSLSocketFactory factory = ctx.getSocketFactory();
+        try (SSLSocket socket = (SSLSocket) factory.createSocket(host, port)) {
+            socket.startHandshake();
+            BufferedWriter out = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));
+            BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
+
+            out.write("Hello ACS\n");
+            out.flush();
+
+            String resp = in.readLine();
+            System.out.println("Response from ACS: " + resp);
+        }
     }
 }
diff --git a/src/main/java/acs/acs/src/Main.java b/src/main/java/acs/acs/src/Main.java
index b72340c..649bce0 100644
--- a/src/main/java/acs/acs/src/Main.java
+++ b/src/main/java/acs/acs/src/Main.java
@@ -1,7 +1,57 @@
 package acs.acs.src;
 
+// File: AcsServer.java
+import javax.net.ssl.*;
+import java.io.*;
+import java.security.KeyStore;
+
 public class Main {
-    public static void main(String[] args) {
-        
+    public static void main(String[] args) throws Exception {
+        int port = 8443;
+        // Keystore containing server private key + cert (PKCS12 or JKS)
+        String keystorePath = "assets/certs/acs.p12";
+        char[] keystorePass = "hepl".toCharArray();
+
+        // Truststore (to verify client if mutual TLS)
+        String truststorePath = "assets/certs/acs-trust.jks";
+        char[] truststorePass = "heplhepl".toCharArray();
+
+        KeyStore ks = KeyStore.getInstance("PKCS12");
+        try (FileInputStream fis = new FileInputStream(keystorePath)) {
+            ks.load(fis, keystorePass);
+        }
+        KeyManagerFactory kmf = KeyManagerFactory.getInstance("SunX509");
+        kmf.init(ks, keystorePass);
+
+        KeyStore ts = KeyStore.getInstance("JKS");
+        try (FileInputStream fis = new FileInputStream(truststorePath)) {
+            ts.load(fis, truststorePass);
+        }
+        TrustManagerFactory tmf = TrustManagerFactory.getInstance("SunX509");
+        tmf.init(ts);
+
+        SSLContext ctx = SSLContext.getInstance("TLS");
+        ctx.init(kmf.getKeyManagers(), tmf.getTrustManagers(), null);
+
+        SSLServerSocketFactory ssf = ctx.getServerSocketFactory();
+        SSLServerSocket serverSocket = (SSLServerSocket) ssf.createServerSocket(port);
+        // si vous voulez mTLS :
+        serverSocket.setNeedClientAuth(true);
+
+        System.out.println("ACS listening on port " + port);
+        while (true) {
+            try (SSLSocket socket = (SSLSocket) serverSocket.accept()) {
+                BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
+                BufferedWriter out = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));
+
+                String line = in.readLine(); // simple single-line message
+                System.out.println("Received from ACQ: " + line);
+
+                out.write("ACK from ACS\n");
+                out.flush();
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+        }
     }
 }