diff --git a/.idea/libraries/Dart_Packages.xml b/.idea/libraries/Dart_Packages.xml
index c584ba9..eb737ec 100644
--- a/.idea/libraries/Dart_Packages.xml
+++ b/.idea/libraries/Dart_Packages.xml
@@ -187,7 +187,7 @@
         <entry key="cli_util">
           <value>
             <list>
-              <option value="$USER_HOME$/.pub-cache/hosted/pub.dev/cli_util-0.3.5/lib" />
+              <option value="$USER_HOME$/.pub-cache/hosted/pub.dev/cli_util-0.4.0/lib" />
             </list>
           </value>
         </entry>
@@ -348,7 +348,7 @@
         <entry key="flutter_launcher_icons">
           <value>
             <list>
-              <option value="$USER_HOME$/.pub-cache/hosted/pub.dev/flutter_launcher_icons-0.12.0/lib" />
+              <option value="$USER_HOME$/.pub-cache/hosted/pub.dev/flutter_launcher_icons-0.13.1/lib" />
             </list>
           </value>
         </entry>
@@ -614,7 +614,7 @@
         <entry key="nextcloud">
           <value>
             <list>
-              <option value="$USER_HOME$/.pub-cache/git/nextcloud-neon-32c6fb857586fda20ced274ed131be90c9adc67d/packages/nextcloud/lib" />
+              <option value="$USER_HOME$/.pub-cache/git/nextcloud-neon-a7be31ff2632d02eea7c19afbfb8e6edf2ea473d/packages/nextcloud/lib" />
             </list>
           </value>
         </entry>
@@ -859,7 +859,7 @@
         <entry key="source_gen">
           <value>
             <list>
-              <option value="$USER_HOME$/.pub-cache/hosted/pub.dev/source_gen-1.2.7/lib" />
+              <option value="$USER_HOME$/.pub-cache/hosted/pub.dev/source_gen-1.3.0/lib" />
             </list>
           </value>
         </entry>
@@ -1062,7 +1062,7 @@
         <entry key="win32">
           <value>
             <list>
-              <option value="$USER_HOME$/.pub-cache/hosted/pub.dev/win32-4.1.3/lib" />
+              <option value="$USER_HOME$/.pub-cache/hosted/pub.dev/win32-4.1.4/lib" />
             </list>
           </value>
         </entry>
@@ -1098,7 +1098,7 @@
     </properties>
     <CLASSES>
       <root url="file://$USER_HOME$/.pub-cache/git/flowder-1ddd171a763c4f1ba09b95e34e35e2e5cf0d1bba//lib" />
-      <root url="file://$USER_HOME$/.pub-cache/git/nextcloud-neon-32c6fb857586fda20ced274ed131be90c9adc67d/packages/nextcloud/lib" />
+      <root url="file://$USER_HOME$/.pub-cache/git/nextcloud-neon-a7be31ff2632d02eea7c19afbfb8e6edf2ea473d/packages/nextcloud/lib" />
       <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dev/_fe_analyzer_shared-59.0.0/lib" />
       <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dev/analyzer-5.11.1/lib" />
       <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dev/another_flushbar-1.12.29/lib" />
@@ -1125,7 +1125,7 @@
       <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dev/cached_network_image_web-1.0.2/lib" />
       <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dev/characters-1.2.1/lib" />
       <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dev/checked_yaml-2.0.3/lib" />
-      <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dev/cli_util-0.3.5/lib" />
+      <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dev/cli_util-0.4.0/lib" />
       <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dev/clock-1.1.1/lib" />
       <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dev/code_builder-4.4.0/lib" />
       <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dev/collection-1.17.0/lib" />
@@ -1146,7 +1146,7 @@
       <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dev/fixnum-1.1.0/lib" />
       <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dev/flutter_blurhash-0.7.0/lib" />
       <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dev/flutter_cache_manager-3.3.0/lib" />
-      <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dev/flutter_launcher_icons-0.12.0/lib" />
+      <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dev/flutter_launcher_icons-0.13.1/lib" />
       <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dev/flutter_linkify-5.0.2/lib" />
       <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dev/flutter_lints-2.0.1/lib" />
       <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dev/flutter_login-4.1.1/lib" />
@@ -1215,7 +1215,7 @@
       <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dev/shelf-1.4.1/lib" />
       <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dev/shelf_web_socket-1.0.4/lib" />
       <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dev/sign_in_button-3.2.0/lib" />
-      <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dev/source_gen-1.2.7/lib" />
+      <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dev/source_gen-1.3.0/lib" />
       <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dev/source_helper-1.3.3/lib" />
       <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dev/source_span-1.9.1/lib" />
       <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dev/sqflite-2.2.8+1/lib" />
@@ -1244,7 +1244,7 @@
       <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dev/version-3.0.2/lib" />
       <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dev/watcher-1.0.2/lib" />
       <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dev/web_socket_channel-2.4.0/lib" />
-      <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dev/win32-4.1.3/lib" />
+      <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dev/win32-4.1.4/lib" />
       <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dev/xdg_directories-1.0.0/lib" />
       <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dev/xml-6.2.2/lib" />
       <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dev/xml_annotation-2.2.0/lib" />
diff --git a/android/.idea/gradle.xml b/android/.idea/gradle.xml
index 8e3cd5a..8e3b1a8 100644
--- a/android/.idea/gradle.xml
+++ b/android/.idea/gradle.xml
@@ -9,7 +9,10 @@
         <option name="modules">
           <set>
             <option value="$USER_HOME$/.pub-cache/hosted/pub.dev/better_open_file-3.6.4/android" />
+            <option value="$USER_HOME$/.pub-cache/hosted/pub.dev/file_picker-5.2.11/android" />
             <option value="$USER_HOME$/.pub-cache/hosted/pub.dev/flutter_native_splash-2.2.19/android" />
+            <option value="$USER_HOME$/.pub-cache/hosted/pub.dev/flutter_plugin_android_lifecycle-2.0.14/android" />
+            <option value="$USER_HOME$/.pub-cache/hosted/pub.dev/image_picker_android-0.8.6+11/android" />
             <option value="$USER_HOME$/.pub-cache/hosted/pub.dev/path_provider_android-2.0.27/android" />
             <option value="$USER_HOME$/.pub-cache/hosted/pub.dev/shared_preferences_android-2.1.4/android" />
             <option value="$USER_HOME$/.pub-cache/hosted/pub.dev/sqflite-2.2.8+1/android" />
diff --git a/android/.idea/jarRepositories.xml b/android/.idea/jarRepositories.xml
index 2cb85bc..7a35ca4 100644
--- a/android/.idea/jarRepositories.xml
+++ b/android/.idea/jarRepositories.xml
@@ -17,8 +17,8 @@
       <option name="url" value="https://repo.maven.apache.org/maven2/" />
     </remote-repository>
     <remote-repository>
-      <option name="id" value="Google7" />
-      <option name="name" value="Google7" />
+      <option name="id" value="Google9" />
+      <option name="name" value="Google9" />
       <option name="url" value="https://dl.google.com/dl/android/maven2/" />
     </remote-repository>
     <remote-repository>
diff --git a/android/.idea/workspace.xml b/android/.idea/workspace.xml
index 4cc43c7..5534c9c 100644
--- a/android/.idea/workspace.xml
+++ b/android/.idea/workspace.xml
@@ -4,33 +4,32 @@
     <option name="autoReloadType" value="NONE" />
   </component>
   <component name="ChangeListManager">
-    <list default="true" id="b12972d0-6414-4d45-a46d-735d4cabb20a" name="Changes" comment="">
+    <list default="true" id="55523c1b-a651-4ecd-b499-9518606f9735" name="Changes" comment="">
       <change beforePath="$PROJECT_DIR$/../.idea/libraries/Dart_Packages.xml" beforeDir="false" afterPath="$PROJECT_DIR$/../.idea/libraries/Dart_Packages.xml" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/../.idea/libraries/Flutter_Plugins.xml" beforeDir="false" afterPath="$PROJECT_DIR$/../.idea/libraries/Flutter_Plugins.xml" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/.idea/.gitignore" beforeDir="false" />
-      <change beforePath="$PROJECT_DIR$/.idea/compiler.xml" beforeDir="false" />
-      <change beforePath="$PROJECT_DIR$/.idea/gradle.xml" beforeDir="false" />
-      <change beforePath="$PROJECT_DIR$/.idea/jarRepositories.xml" beforeDir="false" />
-      <change beforePath="$PROJECT_DIR$/.idea/kotlinc.xml" beforeDir="false" />
-      <change beforePath="$PROJECT_DIR$/.idea/misc.xml" beforeDir="false" />
-      <change beforePath="$PROJECT_DIR$/.idea/vcs.xml" beforeDir="false" />
-      <change beforePath="$PROJECT_DIR$/app/src/main/AndroidManifest.xml" beforeDir="false" afterPath="$PROJECT_DIR$/app/src/main/AndroidManifest.xml" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/../pubspec.yaml" beforeDir="false" afterPath="$PROJECT_DIR$/../pubspec.yaml" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/.idea/gradle.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/gradle.xml" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/.idea/jarRepositories.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/jarRepositories.xml" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
     </list>
     <option name="SHOW_DIALOG" value="false" />
     <option name="HIGHLIGHT_CONFLICTS" value="true" />
     <option name="HIGHLIGHT_NON_ACTIVE_CHANGELIST" value="false" />
     <option name="LAST_RESOLUTION" value="IGNORE" />
   </component>
+  <component name="ExecutionTargetManager" SELECTED_TARGET="device_and_snapshot_combo_box_target[/home/elias/.android/avd/Pixel_XL_API_30.avd]" />
   <component name="ExternalProjectsData">
     <projectState path="$PROJECT_DIR$">
       <ProjectState />
     </projectState>
   </component>
+  <component name="GenerateSignedApkSettings">
+    <option name="EXPORT_PRIVATE_KEY" value="false" />
+    <option name="KEY_STORE_PATH" value="$USER_HOME$/upload-keystore.jks" />
+    <option name="KEY_ALIAS" value="upload" />
+  </component>
   <component name="Git.Settings">
     <option name="RECENT_GIT_ROOT_PATH" value="$PROJECT_DIR$/.." />
   </component>
-  <component name="ProjectId" id="2PLL52HWsN0gIlWSFqe92pMyCcT" />
+  <component name="ProjectId" id="2PQt9ih7RXI4ANibeGG9zQL3kSX" />
   <component name="ProjectLevelVcsManager" settingsEditedManually="true" />
   <component name="ProjectViewState">
     <option name="hideEmptyMiddlePackages" value="true" />
@@ -38,12 +37,18 @@
   </component>
   <component name="PropertiesComponent"><![CDATA[{
   "keyToString": {
-    "RunOnceActivity.OpenProjectViewOnStart": "true",
-    "RunOnceActivity.ShowReadmeOnStart": "true",
+    "BundleExportedModule": "android.app",
+    "ExportBundle.BundlePathForandroid.app": "/home/elias/projects/MarianumMobile/Client/android/app",
     "RunOnceActivity.cidr.known.project.marker": "true",
     "cidr.known.project.marker": "true",
     "dart.analysis.tool.window.visible": "false",
+    "last_opened_file_path": "/home/elias/upload-keystore.jks",
     "show.migrate.to.gradle.popup": "false"
+  },
+  "keyToStringList": {
+    "ExportApk.BuildVariants": [
+      "release"
+    ]
   }
 }]]></component>
   <component name="RunManager">
@@ -109,11 +114,11 @@
   <component name="SpellCheckerSettings" RuntimeDictionaries="0" Folders="0" CustomDictionaries="0" DefaultDictionary="application-level" UseSingleDictionary="true" transferred="true" />
   <component name="TaskManager">
     <task active="true" id="Default" summary="Default task">
-      <changelist id="b12972d0-6414-4d45-a46d-735d4cabb20a" name="Changes" comment="" />
-      <created>1683231228875</created>
+      <changelist id="55523c1b-a651-4ecd-b499-9518606f9735" name="Changes" comment="" />
+      <created>1683400983746</created>
       <option name="number" value="Default" />
       <option name="presentableId" value="Default" />
-      <updated>1683231228875</updated>
+      <updated>1683400983746</updated>
     </task>
     <servers />
   </component>
diff --git a/lib/api/marianumcloud/webdav/queries/listFiles/listFilesCache.dart b/lib/api/marianumcloud/webdav/queries/listFiles/listFilesCache.dart
index ea00d01..aa9e25d 100644
--- a/lib/api/marianumcloud/webdav/queries/listFiles/listFilesCache.dart
+++ b/lib/api/marianumcloud/webdav/queries/listFiles/listFilesCache.dart
@@ -1,4 +1,5 @@
 import 'dart:convert';
+import 'package:crypto/crypto.dart';
 import 'package:marianum_mobile/api/marianumcloud/webdav/queries/listFiles/listFiles.dart';
 import 'package:marianum_mobile/api/marianumcloud/webdav/queries/listFiles/listFilesParams.dart';
 import 'package:marianum_mobile/api/marianumcloud/webdav/queries/listFiles/listFilesResponse.dart';
@@ -8,7 +9,8 @@ class ListFilesCache extends RequestCache<ListFilesResponse> {
   String path;
 
   ListFilesCache({required onUpdate, required this.path}) : super(RequestCache.cacheNothing, onUpdate) {
-    String cacheName = path.replaceAll(RegExp("[^A-Za-z0-9]"), "_"); //TODO this is very evil, "/ü/" > "___" also "/ä/" > "___"
+    var bytes = utf8.encode("MarianumMobile-$path");
+    String cacheName = md5.convert(bytes).toString();
     start("MarianumMobile", "wd-folder-$cacheName");
   }
 
diff --git a/pubspec.yaml b/pubspec.yaml
index 651814e..d1d3027 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -67,6 +67,7 @@ dependencies:
   image_picker: ^0.8.7+4
   file_picker: ^5.2.11
   loader_overlay: ^2.2.0
+  crypto: ^3.0.3
 
 dependency_overrides:
   xml: ^6.2.2