diff --git a/app/src/main/java/org/secuso/privacyfriendlyfoodtracker/helpers/KeyGenHelper.java b/app/src/main/java/org/secuso/privacyfriendlyfoodtracker/helpers/KeyGenHelper.java
index 884ae33..cff27d9 100644
--- a/app/src/main/java/org/secuso/privacyfriendlyfoodtracker/helpers/KeyGenHelper.java
+++ b/app/src/main/java/org/secuso/privacyfriendlyfoodtracker/helpers/KeyGenHelper.java
@@ -112,7 +112,10 @@ public static void generateKey(Context context) throws Exception {
      */
     public static void generatePassphrase(Context context) throws Exception {
         SharedPreferences pref = context.getSharedPreferences(SHARED_PREFERENCE_NAME, Context.MODE_PRIVATE);
+
         String enryptedKeyB64 = pref.getString(ENCRYPTED_KEY, null);
+        if(enryptedKeyB64 != null) return;
+
         byte[] encryptedKey = rsaEncrypt(generateKeyPassphrase());
         enryptedKeyB64 = Base64.encodeToString(encryptedKey, Base64.DEFAULT);
         SharedPreferences.Editor edit = pref.edit();