diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/orbot/OrbotHelper.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/orbot/OrbotHelper.java
index aa2052a26..c0aa95201 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/orbot/OrbotHelper.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/orbot/OrbotHelper.java
@@ -40,9 +40,13 @@ import android.content.DialogInterface;
 import android.content.Intent;
 import android.content.pm.PackageManager;
 import android.net.Uri;
+
 import org.sufficientlysecure.keychain.R;
 
-
+/**
+ * This class has been taken from the NetCipher library
+ * https://github.com/guardianproject/NetCipher
+ */
 public class OrbotHelper {
 
     private final static int REQUEST_CODE_STATUS = 100;
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/orbot/TorServiceUtils.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/orbot/TorServiceUtils.java
index 60611d251..76eff25d7 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/orbot/TorServiceUtils.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/orbot/TorServiceUtils.java
@@ -44,6 +44,10 @@ import java.util.StringTokenizer;
 
 import android.util.Log;
 
+/**
+ * This class has been taken from the NetCipher library
+ * https://github.com/guardianproject/NetCipher
+ */
 public class TorServiceUtils {
 
     private final static String TAG = "TorUtils";