diff --git a/.obsidian/workspace.json b/.obsidian/workspace.json
index f545e92..09b1c77 100644
--- a/.obsidian/workspace.json
+++ b/.obsidian/workspace.json
@@ -13,10 +13,10 @@
             "state": {
               "type": "pdf",
               "state": {
-                "file": "ISEN/Web/CIPA 4/TP/TP4/tp4.pdf"
+                "file": "ISEN/Web/CIPA 4/TP/TP5/tp5.pdf"
               },
               "icon": "lucide-file-text",
-              "title": "tp4"
+              "title": "tp5"
             }
           }
         ]
@@ -194,23 +194,25 @@
   },
   "active": "e11a6a080eb83632",
   "lastOpenFiles": [
-    "ISEN/Web/CIPA 4/TP/TP4/process_f2.php",
-    "ISEN/Web/CIPA 4/TP/TP4/process_f1.php",
-    "ISEN/Web/CIPA 4/TP/TP4/test.php",
-    "ISEN/Introduction a la cyber et a la cryptographie/CIPA 4/Crypto Cours 2.md",
+    "ISEN/Web/CIPA 4/TP/TP5/docker-compose.yml",
+    "ISEN/Web/CIPA 4/TP/TP5/query.sql",
+    "ISEN/Web/CIPA 4/TP/TP5/php/chat.php",
+    "ISEN/Web/CIPA 4/TP/TP5/php/database.php",
+    "ISEN/Web/CIPA 4/TP/TP5/php/constants.php",
+    "ISEN/Web/CIPA 4/TP/TP5/php",
+    "ISEN/Web/CIPA 4/TP/TP5/sql/model.sql",
+    "ISEN/Web/CIPA 4/TP/TP5/sql/data.sql",
+    "ISEN/Web/CIPA 4/TP/TP5/sql",
+    "ISEN/Web/CIPA 4/TP/TP5/MPD.png",
+    "ISEN/Web/CIPA 4/TP/TP5/MCD.png",
+    "ISEN/Web/CIPA 4/TP/TP5/MCD.mcd",
     "ISEN/Web/CIPA 4/TP/TP4/tp4.pdf",
-    "ISEN/Web/CIPA 4/TP/TP4/tp4.php",
+    "ISEN/Introduction a la cyber et a la cryptographie/CIPA 4/Crypto Cours 2.md",
     "ISEN/Introduction a la cyber et a la cryptographie/CIPA 4/Crypto Cours 1.md",
     "ISEN/Réunion/CIPA 3/Rentrée 2024-25.md",
-    "ISEN/Introduction a la cyber et a la cryptographie/CIPA 4/tables_gf256.res",
-    "ISEN/Introduction a la cyber et a la cryptographie/CIPA 4/20250708_CRYPTO_slides.pdf",
-    "ISEN/Introduction a la cyber et a la cryptographie/CIPA 4/20250708_CRYPTO_exos_avec_corriges.pdf",
-    "ISEN/Introduction a la cyber et a la cryptographie/CIPA 4/20011126_fips-197.pdf",
     "ISEN/Réunion/CIPA 3/Départ en entreprise 1 20-09-2024.md",
-    "ISEN/Réunion/CIPA 3/CR Conseil de scolarité S6.pdf",
     "ISEN/Réunion/CIPA 3/CR Conseil de scolarité S6.md",
     "ISEN/Sécurité IOT/CIPA4/Sécurité IOT Cours 1.md",
-    "ISEN/Traitement du signal/CIPA4/TP/TP4/~WRL0001.tmp",
     "ISEN/Introduction a la cyber et a la cryptographie/CIPA 4/Cyber Cours 2.md",
     "ISEN/Introduction a la cyber et a la cryptographie/CIPA 4/Cyber Cours 1.md",
     "ISEN/Réunion/CIPA 4/Réunion international.md",
@@ -241,8 +243,6 @@
     "src/Pasted image 20240123120807.png",
     "ISEN/Réseau/A2/TP Ansible et docker.canvas",
     "ISEN/BDD/CIR2/TD2.canvas",
-    "Pasted image 20250905143950.png",
-    "Pasted image 20250905144746.png",
     "ISEN/Modelec/NB point.canvas",
     "Untitled.canvas",
     "ISEN/Other/Graph Overseer.canvas",
diff --git a/ISEN/Web/CIPA 4/TP/TP5/MCD.mcd b/ISEN/Web/CIPA 4/TP/TP5/MCD.mcd
new file mode 100644
index 0000000..d0f2129
Binary files /dev/null and b/ISEN/Web/CIPA 4/TP/TP5/MCD.mcd differ
diff --git a/ISEN/Web/CIPA 4/TP/TP5/MCD.png b/ISEN/Web/CIPA 4/TP/TP5/MCD.png
new file mode 100644
index 0000000..6f9744f
Binary files /dev/null and b/ISEN/Web/CIPA 4/TP/TP5/MCD.png differ
diff --git a/ISEN/Web/CIPA 4/TP/TP5/MPD.png b/ISEN/Web/CIPA 4/TP/TP5/MPD.png
new file mode 100644
index 0000000..4982606
Binary files /dev/null and b/ISEN/Web/CIPA 4/TP/TP5/MPD.png differ
diff --git a/ISEN/Web/CIPA 4/TP/TP5/docker-compose.yml b/ISEN/Web/CIPA 4/TP/TP5/docker-compose.yml
new file mode 100644
index 0000000..25db2a4
--- /dev/null
+++ b/ISEN/Web/CIPA 4/TP/TP5/docker-compose.yml	
@@ -0,0 +1,12 @@
+version: '3.8'
+services:
+  db:
+    image: postgres:17
+    environment:
+      POSTGRES_DB: devweb
+      POSTGRES_USER: postgres
+      POSTGRES_PASSWORD: a
+    ports:
+      - "5432:5432"
+    volumes:
+      - ./sql:/docker-entrypoint-initdb.d
diff --git a/ISEN/Web/CIPA 4/TP/TP5/php/chat.php b/ISEN/Web/CIPA 4/TP/TP5/php/chat.php
new file mode 100644
index 0000000..14f6974
--- /dev/null
+++ b/ISEN/Web/CIPA 4/TP/TP5/php/chat.php	
@@ -0,0 +1,15 @@
+<?php
+require_once 'database.php';
+
+ini_set('display_errors', 1);
+ini_set('display_startup_errors', 1);
+error_reporting(E_ALL);
+
+$db = dbConnect();
+
+if (isset($_GET['request']) && $_GET['request'] == 'channels') {
+    $channels = dbGetChannels($db);
+    header('Content-Type: application/json; charset=utf-8');
+    echo json_encode($channels);
+}
+?>
diff --git a/ISEN/Web/CIPA 4/TP/TP5/php/constants.php b/ISEN/Web/CIPA 4/TP/TP5/php/constants.php
new file mode 100644
index 0000000..9f9e005
--- /dev/null
+++ b/ISEN/Web/CIPA 4/TP/TP5/php/constants.php	
@@ -0,0 +1,6 @@
+<?php
+define('DB_USER', 'postgres');
+define('DB_PASSWORD', 'a');
+define('DB_NAME', 'devweb');
+define('DB_SERVER', '127.0.0.1');
+define('DB_PORT', '5432');
diff --git a/ISEN/Web/CIPA 4/TP/TP5/php/database.php b/ISEN/Web/CIPA 4/TP/TP5/php/database.php
new file mode 100644
index 0000000..072872f
--- /dev/null
+++ b/ISEN/Web/CIPA 4/TP/TP5/php/database.php	
@@ -0,0 +1,24 @@
+<?php
+require_once 'constants.php';
+
+function dbConnect() {
+    $dsn = 'pgsql:dbname=' . DB_NAME . ';host=' . DB_SERVER . ';port=' . DB_PORT;
+    try {
+        $pdo = new PDO($dsn, DB_USER, DB_PASSWORD);
+        $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
+        return $pdo;
+    } catch (PDOException $e) {
+        return false;
+    }
+}
+
+function dbGetChannels($db) {
+    try {
+        $query = "SELECT * FROM channels";
+        $statement = $db->query($query);
+        $channels = $statement->fetchAll(PDO::FETCH_ASSOC);
+        return $channels;
+    } catch (PDOException $e) {
+        return false;
+    }
+}
diff --git a/ISEN/Web/CIPA 4/TP/TP5/query.sql b/ISEN/Web/CIPA 4/TP/TP5/query.sql
new file mode 100644
index 0000000..82c8c68
--- /dev/null
+++ b/ISEN/Web/CIPA 4/TP/TP5/query.sql	
@@ -0,0 +1,3 @@
+-- Requête pour la liste des salons (channels) (Step 9)
+SELECT * FROM channels;
+
diff --git a/ISEN/Web/CIPA 4/TP/TP5/sql/data.sql b/ISEN/Web/CIPA 4/TP/TP5/sql/data.sql
new file mode 100644
index 0000000..103a5e3
--- /dev/null
+++ b/ISEN/Web/CIPA 4/TP/TP5/sql/data.sql	
@@ -0,0 +1,31 @@
+
+DELETE FROM users;
+DELETE FROM channels;
+DELETE FROM messages;
+
+-- -------------------------------------------------------------------------------
+-- --- Populate users database ----------------------------------------------------------------------------------------------------------------------------------
+INSERT INTO users(login, nickname, password) VALUES('etudiant0', 'E0','mp0');
+INSERT INTO users(login, nickname, password) VALUES('etudiant1', 'E1','mp1');
+INSERT INTO users(login, nickname, password) VALUES('etudiant2', 'E2','mp2');
+INSERT INTO users(login, nickname, password) VALUES('etudiant3', 'E3','mp3');
+
+-- -------------------------------------------------------------------------------
+-- --- Populate channels database ---------------------------------------------------
+-- -------------------------------------------------------------------------------
+ALTER SEQUENCE channels_id_seq RESTART;
+INSERT INTO channels(name) VALUES('General');
+INSERT INTO channels(name) VALUES('Musique');
+INSERT INTO channels(name) VALUES('Voyage');
+INSERT INTO channels(name) VALUES('Cinema');
+INSERT INTO channels(name) VALUES('Bricolage');
+
+-------------------------------------------------------------------------------
+--- Populate messages database ------------------------------------------------
+-------------------------------------------------------------------------------
+ALTER SEQUENCE messages_id_seq RESTART;
+INSERT INTO messages(userLogin, channelid, message) VALUES('etudiant0', 1, 'a');
+INSERT INTO messages(userLogin, channelid, message) VALUES('etudiant1', 1, 'b');
+INSERT INTO messages(userLogin, channelid, message) VALUES('etudiant0', 1, 'c');
+INSERT INTO messages(userLogin, channelid, message) VALUES('etudiant2', 3, 'd');
+INSERT INTO messages(userLogin, channelid, message) VALUES('etudiant3', 4, 'e');
diff --git a/ISEN/Web/CIPA 4/TP/TP5/sql/model.sql b/ISEN/Web/CIPA 4/TP/TP5/sql/model.sql
new file mode 100644
index 0000000..a35b377
--- /dev/null
+++ b/ISEN/Web/CIPA 4/TP/TP5/sql/model.sql	
@@ -0,0 +1,37 @@
+
+-- USE devweb_m1;
+
+DROP TABLE IF EXISTS messages;
+DROP TABLE IF EXISTS channels;
+DROP TABLE IF EXISTS users;
+
+CREATE TABLE users
+(
+  login VARCHAR(20) PRIMARY KEY,
+  nickname VARCHAR(20) NOT NULL,
+  password VARCHAR(40) NOT NULL
+);
+
+
+CREATE TABLE channels
+(
+  id SERIAL PRIMARY KEY,
+  name VARCHAR(20) NOT NULL
+);
+
+
+CREATE TABLE messages
+(
+  id SERIAL PRIMARY KEY,
+  userLogin VARCHAR(20) NOT NULL,
+  channelId INT NOT NULL,
+  message VARCHAR(256) NOT NULL,
+  timestamp TIMESTAMP NOT NULL default CURRENT_TIMESTAMP,
+  FOREIGN KEY(userLogin) REFERENCES users(login)
+    ON UPDATE CASCADE ON DELETE CASCADE,
+  FOREIGN KEY(channelId) REFERENCES channels(id)
+    ON UPDATE CASCADE ON DELETE CASCADE
+);
+
+
+
diff --git a/ISEN/Web/CIPA 4/TP/TP5/tp5.pdf b/ISEN/Web/CIPA 4/TP/TP5/tp5.pdf
new file mode 100644
index 0000000..a75965d
Binary files /dev/null and b/ISEN/Web/CIPA 4/TP/TP5/tp5.pdf differ