diff --git a/Android/app/build.gradle b/Android/app/build.gradle
index 5b7025d..8968c27 100644
--- a/Android/app/build.gradle
+++ b/Android/app/build.gradle
@@ -10,7 +10,7 @@ android {
     defaultConfig {
         applicationId "com.example.mathseduc"
         minSdk 21
-        targetSdk 34
+        targetSdk 33
         versionCode 1
         versionName "1.0"
 
@@ -44,4 +44,5 @@ dependencies {
 
     implementation("com.squareup.okhttp3:okhttp:4.10.0")
     implementation("com.google.code.gson:gson:2.10.1")
+    implementation "org.mindrot:jbcrypt:0.4"
 }
\ No newline at end of file
diff --git a/Android/app/src/main/AndroidManifest.xml b/Android/app/src/main/AndroidManifest.xml
index 3f54b3e..c0ca71d 100644
--- a/Android/app/src/main/AndroidManifest.xml
+++ b/Android/app/src/main/AndroidManifest.xml
@@ -22,5 +22,6 @@
         <activity android:name=".MultiActivity" />
         <activity android:name=".ServerDetailsActivity" />
         <activity android:name=".CreateLobbyActivity" />
+        <activity android:name=".ConnexionPlayerActivity" />
     </application>
 </manifest>
\ No newline at end of file
diff --git a/Android/app/src/main/java/com/example/mathseduc/ConnexionPlayerActivity.kt b/Android/app/src/main/java/com/example/mathseduc/ConnexionPlayerActivity.kt
new file mode 100644
index 0000000..72907b9
--- /dev/null
+++ b/Android/app/src/main/java/com/example/mathseduc/ConnexionPlayerActivity.kt
@@ -0,0 +1,40 @@
+package com.example.mathseduc
+
+import android.content.Intent
+import android.os.Bundle
+import android.widget.Button
+import android.widget.EditText
+import android.widget.Toast
+import androidx.appcompat.app.AppCompatActivity
+import com.example.mathseduc.controllers.ControllerPlayer
+import org.mindrot.jbcrypt.BCrypt
+
+class ConnexionPlayerActivity : AppCompatActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_connexion_player)
+
+        val buttonLogin = findViewById<Button>(R.id.buttonLogin)
+        val editTextNickname = findViewById<EditText>(R.id.editTextNickname)
+        val editTextPassword = findViewById<EditText>(R.id.editTextPassword)
+
+        buttonLogin.setOnClickListener {
+            val nickname = editTextNickname.text.toString()
+            val password = editTextPassword.text.toString()
+
+            val isAuthenticated = ControllerPlayer.authenticateUser(nickname,password)
+            if (isAuthenticated != -1) {
+                // Save authentication status for global accessibility
+                val intent = Intent(this, ServerDetailsActivity::class.java)
+                startActivity(intent)
+
+                MainActivity.idPlayerConnected = isAuthenticated
+
+                Toast.makeText(this, "Connexion réussi, bienvenue $nickname !!", Toast.LENGTH_SHORT).show()
+            } else {
+                // Show an error toast
+                Toast.makeText(this, "Connexion échoué. Veuillez réessayer.", Toast.LENGTH_SHORT).show()
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/Android/app/src/main/java/com/example/mathseduc/MainActivity.kt b/Android/app/src/main/java/com/example/mathseduc/MainActivity.kt
index 311a7f3..6d0ed8c 100644
--- a/Android/app/src/main/java/com/example/mathseduc/MainActivity.kt
+++ b/Android/app/src/main/java/com/example/mathseduc/MainActivity.kt
@@ -3,9 +3,13 @@ package com.example.mathseduc
 import android.content.Intent
 import android.os.Bundle
 import android.widget.Button
+import android.widget.Toast
 import androidx.appcompat.app.AppCompatActivity
 
 class MainActivity : AppCompatActivity() {
+    companion object {
+        var idPlayerConnected: Int = -1
+    }
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
@@ -13,6 +17,7 @@ class MainActivity : AppCompatActivity() {
 
         var btnSolo = findViewById<Button>(R.id.btnSolo)
         var btnMulti = findViewById<Button>(R.id.btnMulti)
+        var btnConnexion = findViewById<Button>(R.id.btnConnexion)
 
         btnSolo.setOnClickListener {
             // Traitement pour le bouton Solo
@@ -20,7 +25,17 @@ class MainActivity : AppCompatActivity() {
         }
 
         btnMulti.setOnClickListener {
-            val intent = Intent(this, MultiActivity::class.java)
+            if (MainActivity.idPlayerConnected != -1){
+                val intent = Intent(this, MultiActivity::class.java)
+                startActivity(intent)
+            }
+            else {
+                Toast.makeText(this, "Vous n'êtes pas connecté", Toast.LENGTH_SHORT).show()
+            }
+        }
+
+        btnConnexion.setOnClickListener {
+            val intent = Intent(this, ConnexionPlayerActivity::class.java)
             startActivity(intent)
         }
     }
diff --git a/Android/app/src/main/java/com/example/mathseduc/controllers/ControllerPlayer.kt b/Android/app/src/main/java/com/example/mathseduc/controllers/ControllerPlayer.kt
index f9b80b0..cd884dc 100644
--- a/Android/app/src/main/java/com/example/mathseduc/controllers/ControllerPlayer.kt
+++ b/Android/app/src/main/java/com/example/mathseduc/controllers/ControllerPlayer.kt
@@ -1,12 +1,16 @@
 package com.example.mathseduc.controllers
 
 import android.os.StrictMode
+import com.example.mathseduc.models.Chapter
+import com.example.mathseduc.models.Lobby
 import com.example.mathseduc.models.LobbyInfo
 import com.example.mathseduc.models.Player
 import com.google.gson.Gson
 import com.google.gson.reflect.TypeToken
+import okhttp3.FormBody
 import okhttp3.OkHttpClient
 import okhttp3.Request
+import org.mindrot.jbcrypt.BCrypt
 import java.io.IOException
 
 class ControllerPlayer {
@@ -61,5 +65,41 @@ class ControllerPlayer {
 
             return null
         }
+        fun authenticateUser(nickname: String, password: String): Int {
+
+            val policy = StrictMode.ThreadPolicy.Builder().permitAll().build()
+            StrictMode.setThreadPolicy(policy)
+
+            // Client HTTP API
+            val client = OkHttpClient()
+
+            // API Access
+            val request = Request.Builder()
+                .url("https://trusting-panini.87-106-126-109.plesk.page/api/verif/player/$nickname/qUOGkWdoPCgbmuqxIC8xiaX0rV1Pw1LoPafkaoHOgszEyD9P2vcOu493xCDZpAqO")
+                .build()
+
+            // API Response
+            client.newCall(request).execute().use { response ->
+                if (response.isSuccessful) {
+                    val responseData = response.body?.string()
+
+                    // Use Gson to parse the JSON response
+                    val gson = Gson()
+                    val playerListType = object : TypeToken<List<Player>>() {}.type
+                    val playerList: List<Player> = gson.fromJson(responseData, playerListType)
+
+                    // Check if the list is not empty
+                    if (playerList.isNotEmpty()) {
+                        val storedPasswordHash = playerList[0].password
+
+                        // Use BCrypt to check if the provided password matches the stored hash
+                        if(BCrypt.checkpw(password, storedPasswordHash)){
+                            return playerList[0].id
+                        }
+                    }
+                }
+            }
+            return -1
+        }
     }
-}
+}
\ No newline at end of file
diff --git a/Android/app/src/main/java/com/example/mathseduc/models/Player.kt b/Android/app/src/main/java/com/example/mathseduc/models/Player.kt
index b18e749..e4d2eff 100644
--- a/Android/app/src/main/java/com/example/mathseduc/models/Player.kt
+++ b/Android/app/src/main/java/com/example/mathseduc/models/Player.kt
@@ -2,5 +2,6 @@ package com.example.mathseduc.models
 
 data class Player(
     val id: Int,
-    val nickname: String
-)
+    val nickname: String,
+    val password: String
+)
\ No newline at end of file
diff --git a/Android/app/src/main/res/layout/activity_connexion_player.xml b/Android/app/src/main/res/layout/activity_connexion_player.xml
new file mode 100644
index 0000000..d49580e
--- /dev/null
+++ b/Android/app/src/main/res/layout/activity_connexion_player.xml
@@ -0,0 +1,40 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:padding="16dp">
+
+    <EditText
+        android:id="@+id/editTextNickname"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:hint="Nickname"
+        android:background="#FFFFFF"
+        android:padding="8dp"
+        android:textColor="#000000"
+        android:layout_marginBottom="16dp"/>
+
+    <EditText
+        android:id="@+id/editTextPassword"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:hint="Password"
+        android:inputType="textPassword"
+        android:background="#FFFFFF"
+        android:padding="8dp"
+        android:textColor="#000000"
+        android:layout_below="@id/editTextNickname"
+        android:layout_marginTop="8dp"
+        android:layout_marginBottom="16dp"/>
+
+    <Button
+        android:id="@+id/buttonLogin"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="Login"
+        android:background="#4CAF50"
+        android:textColor="#FFFFFF"
+        android:layout_below="@id/editTextPassword"
+        android:layout_marginTop="16dp"/>
+</RelativeLayout>
\ No newline at end of file