diff --git a/.idea/vcs.xml b/.idea/vcs.xml
new file mode 100644
index 0000000..35eb1dd
--- /dev/null
+++ b/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index 8c5f749..4d31e21 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -53,4 +53,13 @@ dependencies {
     implementation("androidx.room:room-ktx:$room_version")
     implementation ("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.6.4")
     implementation ("org.jetbrains.kotlinx:kotlinx-coroutines-android:1.6.4")
+
+    // SQLCipher
+    implementation ("net.zetetic:android-database-sqlcipher:4.5.3@aar")
+    implementation ("androidx.sqlite:sqlite:2.1.0")
+    implementation ("androidx.sqlite:sqlite-framework:2.1.0")
+
+    // Server Upload
+    implementation("com.squareup.okhttp3:okhttp:4.12.0")
+
 }
\ No newline at end of file
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 5dcd779..b08ffec 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -1,6 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools">
+    <uses-permission android:name="android.permission.INTERNET" />
+
 
     <application
         android:name=".MyApp"
@@ -12,6 +14,7 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/Theme.Test1"
+        android:networkSecurityConfig="@xml/network_security_config"
         tools:targetApi="31">
 
         <provider
diff --git a/app/src/main/java/com/dano/test1/DatabaseUploader.kt b/app/src/main/java/com/dano/test1/DatabaseUploader.kt
new file mode 100644
index 0000000..c3c4319
--- /dev/null
+++ b/app/src/main/java/com/dano/test1/DatabaseUploader.kt
@@ -0,0 +1,88 @@
+package com.dano.test1
+
+import android.content.Context
+import android.util.Log
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import okhttp3.*
+import java.io.File
+import java.io.IOException
+import kotlin.system.exitProcess
+import okhttp3.MediaType.Companion.toMediaTypeOrNull
+import okhttp3.RequestBody.Companion.asRequestBody
+
+object DatabaseUploader {
+
+    private const val DB_NAME = "questionnaire_database"
+    private const val ENCRYPTED_FILE_NAME = "exported_encrypted_database.db"
+    private const val SERVER_UPLOAD_URL = "http://49.13.157.44/upload.php"
+
+    private val client = OkHttpClient()
+
+    fun uploadEncryptedDatabase(context: Context) {
+        CoroutineScope(Dispatchers.IO).launch {
+            try {
+                Log.d("UPLOAD", "Upload gestartet")
+
+                val dbFile = context.getDatabasePath(DB_NAME)
+                Log.d("UPLOAD", "Pfad zur DB: ${dbFile.absolutePath}, existiert: ${dbFile.exists()}")
+
+                if (!dbFile.exists()) {
+                    Log.e("UPLOAD", "Datenbankdatei existiert nicht.")
+                    return@launch
+                }
+
+                val exportFile = File(context.cacheDir, ENCRYPTED_FILE_NAME)
+                dbFile.copyTo(exportFile, overwrite = true)
+
+                Log.d("UPLOAD", "Datei kopiert: ${exportFile.absolutePath}")
+
+                uploadFile(context, exportFile, dbFile)
+
+            } catch (e: Exception) {
+                Log.e("UPLOAD", "Fehler beim Hochladen der DB", e)
+            }
+        }
+    }
+
+    private fun uploadFile(context: Context, file: File, originalDbFile: File) {
+        val requestBody = MultipartBody.Builder()
+            .setType(MultipartBody.FORM)
+            .addFormDataPart(
+                "file", file.name,
+                file.asRequestBody("application/octet-stream".toMediaTypeOrNull())
+            )
+            .build()
+
+        val request = Request.Builder()
+            .url(SERVER_UPLOAD_URL)
+            .post(requestBody)
+            .build()
+
+        client.newCall(request).enqueue(object : Callback {
+            override fun onFailure(call: Call, e: IOException) {
+                Log.e("UPLOAD", "Upload fehlgeschlagen: ${e.message}")
+            }
+
+            override fun onResponse(call: Call, response: Response) {
+                if (response.isSuccessful) {
+                    Log.d("UPLOAD", "Upload erfolgreich: ${response.message}")
+
+                    // Lokale DB-Datei löschen
+                    if (originalDbFile.delete()) {
+                        Log.d("UPLOAD", "Lokale Datenbank erfolgreich gelöscht.")
+
+                        // App schließen
+                        Log.d("UPLOAD", "App wird beendet.")
+                        exitProcess(0)
+                    } else {
+                        Log.e("UPLOAD", "Löschen der lokalen Datenbank fehlgeschlagen.")
+                    }
+                } else {
+                    Log.e("UPLOAD", "Upload fehlgeschlagen: ${response.code} ${response.message}")
+                }
+            }
+        })
+    }
+}
diff --git a/app/src/main/java/com/dano/test1/HandlerOpeningScreen.kt b/app/src/main/java/com/dano/test1/HandlerOpeningScreen.kt
index f0d728e..c0b18a3 100644
--- a/app/src/main/java/com/dano/test1/HandlerOpeningScreen.kt
+++ b/app/src/main/java/com/dano/test1/HandlerOpeningScreen.kt
@@ -10,6 +10,7 @@ import kotlinx.coroutines.*
 import org.json.JSONArray
 import android.util.Log
 
+
 var INTEGRATION_INDEX_POINTS: Int? = null
 
 class HandlerOpeningScreen(private val activity: MainActivity) {
@@ -22,6 +23,7 @@ class HandlerOpeningScreen(private val activity: MainActivity) {
     private lateinit var buttonLoad: Button
     private lateinit var saveButton: Button
     private lateinit var editButton: Button
+    private lateinit var uploadButton: Button
 
     private val dynamicButtons = mutableListOf<Button>()
     private val questionnaireFiles = mutableMapOf<Button, String>()
@@ -40,6 +42,7 @@ class HandlerOpeningScreen(private val activity: MainActivity) {
         setupLoadButton()
         setupSaveButton()
         setupEditButton()
+        setupUploadButton()
 
         if (!editText.text.isNullOrBlank()) {
             buttonLoad.performClick()
@@ -54,6 +57,7 @@ class HandlerOpeningScreen(private val activity: MainActivity) {
         buttonLoad = activity.findViewById(R.id.loadButton)
         saveButton = activity.findViewById(R.id.saveButton)
         editButton = activity.findViewById(R.id.editButton)
+        uploadButton = activity.findViewById(R.id.uploadButton)
 
         val tag = editText.tag as? String ?: ""
         editText.hint = LanguageManager.getText(languageID, tag)
@@ -233,7 +237,7 @@ class HandlerOpeningScreen(private val activity: MainActivity) {
                 val conditionMet = when (condition.operator) {
                     "!=" -> answerValue != condition.value
                     "==" -> answerValue == condition.value
-                    else -> true // fallback: zeige Fragebogen
+                    else -> true
                 }
 
                 if (conditionMet) break
@@ -488,26 +492,6 @@ class HandlerOpeningScreen(private val activity: MainActivity) {
         return y
     }
 
-    private fun enableCompletedQuestionnaireButtons(clientCode: String) {
-        CoroutineScope(Dispatchers.IO).launch {
-            val completedEntries = MyApp.database.completedQuestionnaireDao().getAllForClient(clientCode)
-
-            val completedFiles = completedEntries
-                .filter { it.isDone }
-                .map { it.questionnaireId.lowercase() }
-
-            withContext(Dispatchers.Main) {
-                questionnaireFiles.forEach { (button, fileName) ->
-                    val isCompleted = completedFiles.any { fileName.lowercase().contains(it) }
-                    if (isCompleted) {
-                        button.isEnabled = true
-                        button.alpha = 1.0f
-                    }
-                }
-            }
-        }
-    }
-
     private fun setupSaveButton() {
         saveButton.text = LanguageManager.getText(languageID, "save")
         saveButton.setOnClickListener {
@@ -560,4 +544,17 @@ class HandlerOpeningScreen(private val activity: MainActivity) {
         }
     }
 
+    private fun setupUploadButton() {
+        uploadButton.text = "Upload"
+        uploadButton.setOnClickListener {
+            val clientCode = editText.text.toString().trim()
+
+            GlobalValues.LAST_CLIENT_CODE = clientCode
+
+            Toast.makeText(activity, "Datenbank wird verschlüsselt...", Toast.LENGTH_SHORT).show()
+            DatabaseUploader.uploadEncryptedDatabase(activity)
+        }
+    }
+
+
 }
\ No newline at end of file
diff --git a/app/src/main/res/layout/opening_screen.xml b/app/src/main/res/layout/opening_screen.xml
index 17a4c24..ee4bbdd 100644
--- a/app/src/main/res/layout/opening_screen.xml
+++ b/app/src/main/res/layout/opening_screen.xml
@@ -44,7 +44,6 @@
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toBottomOf="@id/textView" />
 
-
     <Button
         android:id="@+id/loadButton"
         android:layout_width="72dp"
@@ -54,6 +53,15 @@
         app:layout_constraintStart_toStartOf="@id/editText"
         app:layout_constraintTop_toBottomOf="@id/editText" />
 
+    <Button
+        android:id="@+id/uploadButton"
+        android:layout_width="200dp"
+        android:layout_height="42dp"
+        android:layout_marginTop="52dp"
+        app:layout_constraintEnd_toEndOf="@id/editText"
+        app:layout_constraintStart_toStartOf="@id/editText"
+        app:layout_constraintTop_toBottomOf="@id/editText" />
+
     <Button
         android:id="@+id/editButton"
         android:layout_width="72dp"
diff --git a/app/src/main/res/xml/network_security_config.xml b/app/src/main/res/xml/network_security_config.xml
new file mode 100644
index 0000000..90a04b5
--- /dev/null
+++ b/app/src/main/res/xml/network_security_config.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<network-security-config>
+    <domain-config cleartextTrafficPermitted="true">
+        <domain includeSubdomains="true">49.13.157.44</domain>
+    </domain-config>
+</network-security-config>