diff --git a/OmobiDisplayApp/omobidisplaybackend.cpp b/OmobiDisplayApp/omobidisplaybackend.cpp
index ff3cc48..48602cd 100644
--- a/OmobiDisplayApp/omobidisplaybackend.cpp
+++ b/OmobiDisplayApp/omobidisplaybackend.cpp
@@ -24,10 +24,6 @@ OmobiDisplayBackend::OmobiDisplayBackend(QObject *parent) : QObject(parent)
 
     this->setState(Idle);
     this->ble->startScanningForDevices();
-
-    qDebug() << QCryptographicHash::hash("HalloTest", QCryptographicHash::Sha256).toHex();
-    // dd86fcfda3a20cbb8fbb3026a84550e0d70c2c79e7e8e36d6ffa04b9eef0401f
-    // dd86fcfda3a20cbb8fbb3026a84550e0d70c2c79e7e8e36d6ffa04b9eef0401f
 }
 
 
@@ -35,6 +31,15 @@ void OmobiDisplayBackend::startScanning() {
     this->ble->startScanningForDevices();
 }
 
+void OmobiDisplayBackend::authenticate(QString code) {
+    // tell display to send over existing model data
+    this->setState(Authenticating);
+    QString combinedCode = this->ble->getCurrentDevice()->getAddress().toUpper() + code;
+    QString secret = QCryptographicHash::hash(combinedCode.toUtf8(), QCryptographicHash::Sha256).toHex();
+
+    this->sendBluetoothCommand(AuthorizeSessionCommand, QVariantMap{{"secret", secret}});
+}
+
 void OmobiDisplayBackend::handleBluetoothStateChange(QBluetoothLeUart::BluetoothLeUartState state){
     switch(state){
     case QBluetoothLeUart::Idle: {
@@ -74,12 +79,8 @@ void OmobiDisplayBackend::handleBluetoothStateChange(QBluetoothLeUart::Bluetooth
 }
 
 void OmobiDisplayBackend::handleBluetoothDeviceConected() {
-    this->setState(Initing);
-
-    // tell display to send over existing model data
-    this->sendBluetoothCommand(AuthorizeSessionCommand, QVariantMap{{"secret", QCryptographicHash::hash("1234", QCryptographicHash::Sha256).toHex()}});
-    this->sendBluetoothCommand(GetAllTextSetsCommand);
-    this->sendBluetoothCommand(GetDisplayBrightnessCommand);
+    this->setState(AuthenticationRequired);
+    // TODO: stuff
 }
 
 void OmobiDisplayBackend::handleFoundNewDevice(QBluetoothLeUartDevice* device) {
@@ -149,8 +150,16 @@ void OmobiDisplayBackend::handleBluetoothDataReceived(QString s){
 
     switch (header) {
     case AuthorizeSessionCommand: {
-        // TODO: handle error
-        this->refreshLoadingState();
+        if(status != Success) {
+            this->setState(AuthenticationRequired);
+            return;
+        }
+
+        this->waitingCommands = 0;
+        this->setState(Initing);
+        this->sendBluetoothCommand(GetAllTextSetsCommand);
+        this->sendBluetoothCommand(GetDisplayBrightnessCommand);
+
         break;
     }
     case KeepAliveCommand: {
diff --git a/OmobiDisplayApp/omobidisplaybackend.h b/OmobiDisplayApp/omobidisplaybackend.h
index f0bdfdb..f9a5fec 100644
--- a/OmobiDisplayApp/omobidisplaybackend.h
+++ b/OmobiDisplayApp/omobidisplaybackend.h
@@ -25,6 +25,8 @@ public:
         Scanning,
         ReadyToConnect,
         Connecting,
+        AuthenticationRequired,
+        Authenticating,
         Initing,
         Connected,
         Loading
@@ -57,6 +59,7 @@ private:
 
 public slots:
     Q_INVOKABLE void startScanning();
+    Q_INVOKABLE void authenticate(QString secret);
     Q_INVOKABLE QBluetoothLeUart* getBleController();
     Q_INVOKABLE OmobiDisplayAppState getState();
     Q_INVOKABLE OmobiDisplayTextModel* getDisplayTextModel();
diff --git a/OmobiDisplayApp/ressources/qml/ConnectPage.qml b/OmobiDisplayApp/ressources/qml/ConnectPage.qml
index b765333..e28c844 100644
--- a/OmobiDisplayApp/ressources/qml/ConnectPage.qml
+++ b/OmobiDisplayApp/ressources/qml/ConnectPage.qml
@@ -126,6 +126,45 @@ Page {
         }
     }
 
+    Dialog {
+        id: authenticationDialog
+
+        property bool shouldBeOpened: false
+
+        parent: Overlay.overlay
+        x: (parent.width - width) / 2
+        y: (parent.height - height) / 2
+
+        width: parent.width * 0.9
+
+        modal: true
+        closePolicy: Popup.NoAutoClose
+        standardButtons: Dialog.Ok | Dialog.Cancel
+
+        title: qsTr("Input code")
+
+        onShouldBeOpenedChanged:  {
+            if(shouldBeOpened)
+                open()
+            else
+                close()
+        }
+
+        onAccepted: {
+            backend.authenticate(secretTextInput.text)
+        }
+
+        onRejected: {
+            backend.bleController.disconnectFromDevice()
+        }
+
+        contentItem: TextField {
+            id: secretTextInput
+            placeholderText: qsTr("code")
+            Keys.onReturnPressed: authenticationDialog.accept()
+        }
+    }
+
     states: [
         State {
             name: OmobiDisplayBackend.Idle
@@ -154,6 +193,41 @@ Page {
                 working: false
             }
         },
+
+        State {
+            name: OmobiDisplayBackend.AuthenticationRequired
+
+            PropertyChanges {
+                target: authenticationDialog
+                shouldBeOpened: true
+            }
+
+            PropertyChanges {
+                target: availableDevicesListView
+                enabled: false
+            }
+
+            PropertyChanges {
+                target: root
+                statusText: "trying to authenticate..."
+                working: true
+            }
+        },
+        State {
+            name: OmobiDisplayBackend.Authenticating
+
+            PropertyChanges {
+                target: availableDevicesListView
+                enabled: false
+            }
+
+            PropertyChanges {
+                target: root
+                statusText: "trying to authenticate..."
+                working: true
+            }
+        },
+
         State {
             name: OmobiDisplayBackend.Connecting
 
diff --git a/OmobiDisplayApp/ressources/qml/TextInputDelegate.qml b/OmobiDisplayApp/ressources/qml/TextInputDelegate.qml
index e60d694..0e708ad 100644
--- a/OmobiDisplayApp/ressources/qml/TextInputDelegate.qml
+++ b/OmobiDisplayApp/ressources/qml/TextInputDelegate.qml
@@ -73,6 +73,8 @@ ItemDelegate {
 
             placeholderText: control.placeholderText
             text: control.value
+
+            Keys.onReturnPressed: textEditDialog.accept()
         }
 
         onAccepted: {
diff --git a/OmobiDisplayApp/ressources/qml/main.qml b/OmobiDisplayApp/ressources/qml/main.qml
index 8cb292e..5d62b80 100644
--- a/OmobiDisplayApp/ressources/qml/main.qml
+++ b/OmobiDisplayApp/ressources/qml/main.qml
@@ -104,6 +104,22 @@ ApplicationWindow {
                 }
             },
 
+            State {
+                name: OmobiDisplayBackend.AuthenticationRequired
+                PropertyChanges {
+                    target: mainStack
+                    currentComponent: connectPageComp
+                }
+            },
+
+            State {
+                name: OmobiDisplayBackend.Authenticating
+                PropertyChanges {
+                    target: mainStack
+                    currentComponent: connectPageComp
+                }
+            },
+
             State {
                 name: OmobiDisplayBackend.Initing
                 PropertyChanges {