diff --git a/BackupAPI b/BackupAPI
index 0e84e62..02c5f20 160000
--- a/BackupAPI
+++ b/BackupAPI
@@ -1 +1 @@
-Subproject commit 0e84e62bc4550c2f6cad789930d2842d7cc35333
+Subproject commit 02c5f205d4da91e1aa4143165bc8a0dfac352fed
diff --git a/BackupApp/build.gradle b/BackupApp/build.gradle
index 254993e..866acb0 100644
--- a/BackupApp/build.gradle
+++ b/BackupApp/build.gradle
@@ -3,12 +3,12 @@ apply plugin: 'kotlin-android'
 apply plugin: 'kotlin-android-extensions'
 apply plugin: 'kotlin-kapt'
 
+def pfaFile = rootProject.file('pfa.properties')
+
 android {
     signingConfigs {
-        'pfa-key' {
-            def pfaFile = rootProject.file('pfa.properties')
-
-            if (pfaFile.exists()) {
+        if (pfaFile.exists()) {
+            'pfa-key' {
                 def pfa = new Properties()
                 pfa.load(new FileInputStream(pfaFile))
 
@@ -48,7 +48,9 @@ android {
         }
         debug {
             debuggable true
-            signingConfig signingConfigs.'pfa-key'
+            if (pfaFile.exists()) {
+                signingConfig signingConfigs.'pfa-key'
+            }
         }
     }
 
diff --git a/BackupApp/src/main/AndroidManifest.xml b/BackupApp/src/main/AndroidManifest.xml
index d9bc63c..3b89191 100644
--- a/BackupApp/src/main/AndroidManifest.xml
+++ b/BackupApp/src/main/AndroidManifest.xml
@@ -4,9 +4,13 @@
     package="org.secuso.privacyfriendlybackup">
 
     <queries>
+        <package android:name="org.sufficientlysecure.keychain" />
         <intent>
             <action android:name="org.secuso.privacyfriendlybackup.api.pfa.PFAAuthService" />
         </intent>
+        <intent>
+            <action android:name="org.openintents.openpgp.IOpenPgpService2" />
+        </intent>
     </queries>
 
    <application
@@ -105,8 +109,7 @@
                 <data android:pathPattern=".*\\..*\\..*\\..*\\..*\\..*\\..*\\.backup.*" />
             </intent-filter>
         </activity>
-        <activity android:name=".ui.inspection.DataInspectionActivity"
-            android:parentActivityName=""/>
+        <activity android:name=".ui.inspection.DataInspectionActivity"/>
         <activity android:name=".ui.main.MainActivity"
             android:configChanges="orientation|screenSize"
             android:label="@string/app_name"
diff --git a/BackupApp/src/main/java/org/secuso/privacyfriendlybackup/data/BackupJobManager.kt b/BackupApp/src/main/java/org/secuso/privacyfriendlybackup/data/BackupJobManager.kt
index acb07fa..0288f8f 100644
--- a/BackupApp/src/main/java/org/secuso/privacyfriendlybackup/data/BackupJobManager.kt
+++ b/BackupApp/src/main/java/org/secuso/privacyfriendlybackup/data/BackupJobManager.kt
@@ -2,6 +2,7 @@ package org.secuso.privacyfriendlybackup.data
 
 import android.content.Context
 import androidx.preference.PreferenceManager
+import org.secuso.privacyfriendlybackup.BackupApplication
 import org.secuso.privacyfriendlybackup.data.room.BackupDatabase
 import org.secuso.privacyfriendlybackup.data.room.model.BackupJob
 import org.secuso.privacyfriendlybackup.data.room.model.PFAJob
@@ -72,11 +73,13 @@ class BackupJobManager private constructor(
             nextJob = if(isEncryptionEnabled) encryptId else storeId
         )
         db.backupJobDao().insert(pfaBackupJob)
+        (context.applicationContext as BackupApplication).schedulePeriodicWork()
     }
 
     suspend fun cancelAllJobs(packageName: String) {
         db.backupJobDao().deleteAllForPackage(packageName)
         db.pfaJobDao().deleteAllForPackage(packageName)
+        (context.applicationContext as BackupApplication).schedulePeriodicWork()
     }
 
     /**
@@ -131,5 +134,6 @@ class BackupJobManager private constructor(
             dataId = if(metadata._id != -1L) metadata._id else metadataId
         )
         db.backupJobDao().insert(loadJob)
+        (context.applicationContext as BackupApplication).schedulePeriodicWork()
     }
 }
\ No newline at end of file
diff --git a/BackupApp/src/main/java/org/secuso/privacyfriendlybackup/ui/application/ApplicationOverviewFragment.kt b/BackupApp/src/main/java/org/secuso/privacyfriendlybackup/ui/application/ApplicationOverviewFragment.kt
index 3bae669..e6fd89b 100644
--- a/BackupApp/src/main/java/org/secuso/privacyfriendlybackup/ui/application/ApplicationOverviewFragment.kt
+++ b/BackupApp/src/main/java/org/secuso/privacyfriendlybackup/ui/application/ApplicationOverviewFragment.kt
@@ -33,6 +33,8 @@ class ApplicationOverviewFragment : BaseFragment(), ApplicationAdapter.ManageLis
 
         setHasOptionsMenu(true)
 
+        (requireActivity().applicationContext as BackupApplication).schedulePeriodicWork()
+
         savedInstanceState ?: return
 
         val savedOldMode = savedInstanceState.getString("oldMode")
@@ -62,7 +64,7 @@ class ApplicationOverviewFragment : BaseFragment(), ApplicationAdapter.ManageLis
 
             displayNoElementsImage(data.isEmpty())
 
-            (requireActivity().application as BackupApplication).schedulePeriodicWork()
+            //(requireActivity().application as BackupApplication).schedulePeriodicWork()
         }
     }
 
diff --git a/BackupApp/src/main/java/org/secuso/privacyfriendlybackup/ui/common/BaseFragment.kt b/BackupApp/src/main/java/org/secuso/privacyfriendlybackup/ui/common/BaseFragment.kt
index 5ec340e..b0e641c 100644
--- a/BackupApp/src/main/java/org/secuso/privacyfriendlybackup/ui/common/BaseFragment.kt
+++ b/BackupApp/src/main/java/org/secuso/privacyfriendlybackup/ui/common/BaseFragment.kt
@@ -2,6 +2,7 @@ package org.secuso.privacyfriendlybackup.ui.common
 
 import android.animation.Animator
 import android.animation.ValueAnimator
+import android.content.Context
 import android.content.res.Configuration
 import android.graphics.drawable.ColorDrawable
 import android.os.Bundle
@@ -56,11 +57,11 @@ abstract class BaseFragment : Fragment() {
         }
     }
 
-    protected fun playColorAnimationRes(@ColorRes colorFromId: Int, @ColorRes colorToId: Int, applyAnimation : (a : ValueAnimator) -> Unit = this::defaultFadeAnimation) : Animator {
+    protected fun playColorAnimationRes(@ColorRes colorFromId: Int, @ColorRes colorToId: Int, duration : Long = 250,  applyAnimation : (a : ValueAnimator) -> Unit = this::defaultFadeAnimation) : Animator {
         val colorFrom = ContextCompat.getColor(requireContext(), colorFromId)
         val colorTo = ContextCompat.getColor(requireContext(), colorToId)
 
-        return playColorAnimation(colorFrom, colorTo, 250, applyAnimation)
+        return playColorAnimation(colorFrom, colorTo, duration, applyAnimation)
     }
 
     protected fun playColorAnimation(@ColorInt colorFrom: Int, @ColorInt colorTo: Int, duration : Long = 250, applyAnimation : (a : ValueAnimator) -> Unit = this::defaultFadeAnimation) : Animator {
diff --git a/BackupApp/src/main/java/org/secuso/privacyfriendlybackup/ui/common/DisplayMenuItemActivity.kt b/BackupApp/src/main/java/org/secuso/privacyfriendlybackup/ui/common/DisplayMenuItemActivity.kt
index ca35985..c035fc8 100644
--- a/BackupApp/src/main/java/org/secuso/privacyfriendlybackup/ui/common/DisplayMenuItemActivity.kt
+++ b/BackupApp/src/main/java/org/secuso/privacyfriendlybackup/ui/common/DisplayMenuItemActivity.kt
@@ -17,6 +17,7 @@ import org.secuso.privacyfriendlybackup.ui.main.MainActivity
  * in a [MainActivity].
  */
 class DisplayMenuItemActivity : AppCompatActivity() {
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_display_menu_item)
diff --git a/BackupApp/src/main/java/org/secuso/privacyfriendlybackup/ui/encryption/UserInteractionRequiredActivity.kt b/BackupApp/src/main/java/org/secuso/privacyfriendlybackup/ui/encryption/UserInteractionRequiredActivity.kt
index 7f60411..4f7ff32 100644
--- a/BackupApp/src/main/java/org/secuso/privacyfriendlybackup/ui/encryption/UserInteractionRequiredActivity.kt
+++ b/BackupApp/src/main/java/org/secuso/privacyfriendlybackup/ui/encryption/UserInteractionRequiredActivity.kt
@@ -9,6 +9,7 @@ import androidx.appcompat.app.AppCompatActivity
 import androidx.preference.PreferenceManager
 import androidx.work.*
 import org.openintents.openpgp.util.OpenPgpApi
+import org.secuso.privacyfriendlybackup.BackupApplication
 import org.secuso.privacyfriendlybackup.preference.PreferenceKeys.PREF_ENCRYPTION_KEY
 import org.secuso.privacyfriendlybackup.preference.PreferenceKeys.PREF_ENCRYPTION_PASSPHRASE
 import org.secuso.privacyfriendlybackup.worker.EncryptionWorker
@@ -88,6 +89,9 @@ class UserInteractionRequiredActivity : AppCompatActivity() {
 
             edit.apply()
 
+            // restart the encryption worker
+            (applicationContext as BackupApplication).schedulePeriodicWork()
+
             // after the answer was received, there is no need to display this translucent activity
             finish()
 
diff --git a/BackupApp/src/main/java/org/secuso/privacyfriendlybackup/ui/inspection/DataInspectionActivity.kt b/BackupApp/src/main/java/org/secuso/privacyfriendlybackup/ui/inspection/DataInspectionActivity.kt
index 0b9fbac..034c526 100644
--- a/BackupApp/src/main/java/org/secuso/privacyfriendlybackup/ui/inspection/DataInspectionActivity.kt
+++ b/BackupApp/src/main/java/org/secuso/privacyfriendlybackup/ui/inspection/DataInspectionActivity.kt
@@ -37,10 +37,9 @@ class DataInspectionActivity : AppCompatActivity() {
         setContentView(R.layout.data_inspection_activity)
         supportActionBar?.setDisplayHomeAsUpEnabled(true)
 
-        viewModel = ViewModelProvider(this).get(DataInspectionViewModel::class.java)
+        viewModel = ViewModelProvider(this)[DataInspectionViewModel::class.java]
 
         if (savedInstanceState == null) {
-
             val fragment = DataInspectionFragment.newInstance()
             fragment.arguments = Bundle().apply {
                 putLong(EXTRA_DATA_ID, id)
@@ -57,8 +56,4 @@ class DataInspectionActivity : AppCompatActivity() {
     override fun onBackPressed() {
         finish()
     }
-
-    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
-        super.onActivityResult(requestCode, resultCode, data)
-    }
 }
\ No newline at end of file
diff --git a/BackupApp/src/main/java/org/secuso/privacyfriendlybackup/ui/inspection/DataInspectionFragment.kt b/BackupApp/src/main/java/org/secuso/privacyfriendlybackup/ui/inspection/DataInspectionFragment.kt
index 392636e..500c34a 100644
--- a/BackupApp/src/main/java/org/secuso/privacyfriendlybackup/ui/inspection/DataInspectionFragment.kt
+++ b/BackupApp/src/main/java/org/secuso/privacyfriendlybackup/ui/inspection/DataInspectionFragment.kt
@@ -1,5 +1,6 @@
 package org.secuso.privacyfriendlybackup.ui.inspection
 
+import android.content.Context
 import android.content.Intent
 import android.graphics.Color
 import android.graphics.PorterDuff
@@ -11,13 +12,15 @@ import android.view.*
 import android.widget.CheckBox
 import android.widget.TextView
 import android.widget.Toast
+import androidx.activity.result.ActivityResultLauncher
 import androidx.appcompat.app.AlertDialog
 import androidx.appcompat.app.AppCompatActivity
 import androidx.constraintlayout.widget.ConstraintSet
 import androidx.core.content.ContextCompat
 import androidx.fragment.app.Fragment
+import androidx.lifecycle.DefaultLifecycleObserver
+import androidx.lifecycle.LifecycleOwner
 import androidx.lifecycle.ViewModelProvider
-import androidx.lifecycle.observe
 import androidx.preference.PreferenceManager
 import com.bumptech.glide.Glide
 import kotlinx.android.synthetic.main.data_inspection_fragment.*
@@ -25,6 +28,7 @@ import kotlinx.android.synthetic.main.item_application_job.*
 import org.openintents.openpgp.OpenPgpSignatureResult
 import org.secuso.privacyfriendlybackup.R
 import org.secuso.privacyfriendlybackup.preference.PreferenceKeys
+import org.secuso.privacyfriendlybackup.ui.backup.BackupOverviewFragment
 import java.io.FileNotFoundException
 
 
@@ -46,6 +50,8 @@ class DataInspectionFragment : Fragment() {
 
     private lateinit var viewModel: DataInspectionViewModel
 
+    //private lateinit var test : ActivityResultLauncher<>
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setHasOptionsMenu(true)
@@ -194,7 +200,7 @@ class DataInspectionFragment : Fragment() {
         super.onActivityCreated(savedInstanceState)
 
         val activity = requireActivity()
-        viewModel = ViewModelProvider(activity).get(DataInspectionViewModel::class.java)
+        viewModel = ViewModelProvider(activity)[DataInspectionViewModel::class.java]
 
         encryptionEnabled = PreferenceManager.getDefaultSharedPreferences(requireActivity()).getBoolean(PreferenceKeys.PREF_ENCRYPTION_ENABLE, false)
 
@@ -222,10 +228,10 @@ class DataInspectionFragment : Fragment() {
             data_inspection_load_status_name.setText(it.descriptionRes)
             data_inspection_load_status_image.setColorFilter(ContextCompat.getColor(requireActivity(), it.colorRes))
             when(it) {
-                LoadStatus.UNKNOWN -> {
+                LoadStatus.UNKNOWN, null -> {
                     data_inspection_load_status.visibility = View.GONE
                 }
-                LoadStatus.ERROR -> {
+                LoadStatus.ERROR_INVALID_JSON, LoadStatus.ERROR -> {
                     data_inspection_load_status.visibility = View.VISIBLE
                 }
                 LoadStatus.LOADING -> {
diff --git a/BackupApp/src/main/java/org/secuso/privacyfriendlybackup/worker/BackupJobManagerWorker.kt b/BackupApp/src/main/java/org/secuso/privacyfriendlybackup/worker/BackupJobManagerWorker.kt
index 683bf7a..03f5193 100644
--- a/BackupApp/src/main/java/org/secuso/privacyfriendlybackup/worker/BackupJobManagerWorker.kt
+++ b/BackupApp/src/main/java/org/secuso/privacyfriendlybackup/worker/BackupJobManagerWorker.kt
@@ -36,6 +36,8 @@ class BackupJobManagerWorker(val context: Context, params: WorkerParameters) : C
         val processedJobs = jobs.filter { it.active }
         val unprocessedJobs = jobs.filter { !it.active }
 
+        val jobsToCheck = jobs.toMutableList()
+
         for(job in processedJobs) {
             val workInfoFuture = WorkManager.getInstance(context).getWorkInfosByTag(job.getWorkerTag())
             val workInfoList = workInfoFuture.get()
@@ -57,6 +59,9 @@ class BackupJobManagerWorker(val context: Context, params: WorkerParameters) : C
                         // if it failed - try again
                         job.active = false
                         jobDao.update(job)
+
+                        deleteFollowingJobs(job, jobsToCheck)
+                        // TODO: Show Toast - Job Failed?
                     }
                 }
             }
@@ -126,17 +131,35 @@ class BackupJobManagerWorker(val context: Context, params: WorkerParameters) : C
             }
         }
 
-
-        coroutineScope {
-            launch {
-                delay(1500L)
-                (context.applicationContext as BackupApplication).schedulePeriodicWork()
+        // continue calling the service if there are still jobs left to do
+        if(jobsToCheck.isNotEmpty()) {
+            coroutineScope {
+                launch {
+                    delay(1500L)
+                    (context.applicationContext as BackupApplication).schedulePeriodicWork()
+                }
             }
         }
 
         return Result.success()
     }
 
+    private fun deleteFollowingJobs(job: BackupJob, jobsToCheck: MutableList<BackupJob>, jobsToDelete : MutableList<BackupJob> = mutableListOf<BackupJob>()) {
+        jobsToDelete.add(job)
+
+        if(job.nextJob == null) {
+            return
+        }
+
+        for(j in jobsToCheck) {
+            if(j._id == job.nextJob) {
+                deleteFollowingJobs(j, jobsToCheck, jobsToDelete)
+            }
+        }
+
+        jobsToCheck.removeAll(jobsToDelete)
+    }
+
     private fun enqueueEncryptionWork(job : BackupJob) {
         val encryptionWork = createEncryptionWorkRequest(job, true, pref)
 
diff --git a/BackupApp/src/main/java/org/secuso/privacyfriendlybackup/worker/EncryptionWorker.kt b/BackupApp/src/main/java/org/secuso/privacyfriendlybackup/worker/EncryptionWorker.kt
index 229b7f5..9f6934b 100644
--- a/BackupApp/src/main/java/org/secuso/privacyfriendlybackup/worker/EncryptionWorker.kt
+++ b/BackupApp/src/main/java/org/secuso/privacyfriendlybackup/worker/EncryptionWorker.kt
@@ -381,7 +381,7 @@ class EncryptionWorker(val context: Context, params: WorkerParameters) : Corouti
                     context,
                     requestCode,
                     intent,
-                    PendingIntent.FLAG_UPDATE_CURRENT
+                    PendingIntent.FLAG_IMMUTABLE or PendingIntent.FLAG_UPDATE_CURRENT
                 )
                 setContentIntent(pendingIntent)
             }.build()