diff --git a/app/src/main/java/eu/darken/capod/main/ui/settings/general/GeneralSettingsFragment.kt b/app/src/main/java/eu/darken/capod/main/ui/settings/general/GeneralSettingsFragment.kt
index a3564f74..c1340c80 100644
--- a/app/src/main/java/eu/darken/capod/main/ui/settings/general/GeneralSettingsFragment.kt
+++ b/app/src/main/java/eu/darken/capod/main/ui/settings/general/GeneralSettingsFragment.kt
@@ -76,17 +76,18 @@ class GeneralSettingsFragment : PreferenceFragment3() {
     private fun String.fromHumanReadable(): ByteArray = split("-").map { it.toInt(16).toByte() }.toByteArray()
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
-        vm.bondedDevices.observe2 { devices ->
+        vm.state.observe2 { state ->
             mainDeviceAddressPref.setOnPreferenceClickListener {
                 val dialog = DeviceSelectionDialogFactory(requireContext()).create(
-                    devices,
-                    devices.firstOrNull { it.address == generalSettings.mainDeviceAddress.value }
+                    state.devices,
+                    state.devices.firstOrNull { it.address == generalSettings.mainDeviceAddress.value }
                 ) { selected ->
                     generalSettings.mainDeviceAddress.value = selected?.address
                 }
                 dialog.show()
                 true
             }
+            mainDeviceEncryptionKeyPref.isEnabled = state.hasIdentityKey
         }
 
         vm.events.observe2 {
diff --git a/app/src/main/java/eu/darken/capod/main/ui/settings/general/GeneralSettingsFragmentVM.kt b/app/src/main/java/eu/darken/capod/main/ui/settings/general/GeneralSettingsFragmentVM.kt
index a842d0bd..16da29c7 100644
--- a/app/src/main/java/eu/darken/capod/main/ui/settings/general/GeneralSettingsFragmentVM.kt
+++ b/app/src/main/java/eu/darken/capod/main/ui/settings/general/GeneralSettingsFragmentVM.kt
@@ -2,6 +2,7 @@ package eu.darken.capod.main.ui.settings.general
 
 import androidx.lifecycle.SavedStateHandle
 import dagger.hilt.android.lifecycle.HiltViewModel
+import eu.darken.capod.common.bluetooth.BluetoothDevice2
 import eu.darken.capod.common.bluetooth.BluetoothManager2
 import eu.darken.capod.common.coroutine.DispatcherProvider
 import eu.darken.capod.common.debug.logging.logTag
@@ -10,9 +11,10 @@ import eu.darken.capod.common.livedata.SingleLiveEvent
 import eu.darken.capod.common.uix.ViewModel3
 import eu.darken.capod.main.core.GeneralSettings
 import eu.darken.capod.main.core.MonitorMode
+import kotlinx.coroutines.flow.combine
 import kotlinx.coroutines.flow.filter
-import kotlinx.coroutines.flow.map
 import kotlinx.coroutines.flow.onEach
+import kotlinx.coroutines.flow.onStart
 import javax.inject.Inject
 
 @HiltViewModel
@@ -23,10 +25,6 @@ class GeneralSettingsFragmentVM @Inject constructor(
     private val generalSettings: GeneralSettings,
 ) : ViewModel3(dispatcherProvider) {
 
-    val bondedDevices = bluetoothManager.bondedDevices()
-        .map { it.toList() }
-        .asLiveData2()
-
     val events = SingleLiveEvent<GeneralSettingsEvents>()
 
     init {
@@ -39,6 +37,21 @@ class GeneralSettingsFragmentVM @Inject constructor(
             .launchInViewModel()
     }
 
+    val state = combine(
+        bluetoothManager.bondedDevices().onStart { emit(emptySet()) },
+        generalSettings.mainDeviceIdentityKey.flow
+    ) { bondedDevices, identityKey ->
+        State(
+            devices = bondedDevices.toList(),
+            hasIdentityKey = identityKey != null
+        )
+    }.asLiveData2()
+
+    data class State(
+        val devices: List<BluetoothDevice2>,
+        val hasIdentityKey: Boolean
+    )
+
     companion object {
         private val TAG = logTag("Settings", "General", "VM")
     }
diff --git a/app/src/main/res/xml/preferences_general.xml b/app/src/main/res/xml/preferences_general.xml
index ff5fe7a5..e0a3fdd4 100644
--- a/app/src/main/res/xml/preferences_general.xml
+++ b/app/src/main/res/xml/preferences_general.xml
@@ -51,6 +51,7 @@
         <Preference
             android:icon="@drawable/ic_key_24"
             android:key="core.maindevice.encryptionkey"
+            app:enabled="false"
             android:summary="@string/settings_maindevice_encryptionkey_description"
             android:title="@string/settings_maindevice_encryptionkey_label" />
     </PreferenceCategory>