diff --git a/lib/api/impl/privacy_idea_container_api.dart b/lib/api/impl/privacy_idea_container_api.dart
index b522063e..95048a9b 100644
--- a/lib/api/impl/privacy_idea_container_api.dart
+++ b/lib/api/impl/privacy_idea_container_api.dart
@@ -135,6 +135,8 @@ class PiContainerApi implements TokenContainerApi {
         '|${container.timestamp.toIso8601String().replaceFirst('Z', '+00:00')}'
         '|${container.serial}'
         '|${container.registrationUrl}'
+        '|${InfoUtils.deviceBrand}'
+        '|${InfoUtils.deviceModel}'
         '${passphrase != null ? '|$passphrase' : ''}';
 
     final signature = eccUtils.signWithPrivateKey(ecPrivateClientKey, message);