diff --git a/src/knx/security_interface_object.cpp b/src/knx/security_interface_object.cpp
index c7cf981..1e109be 100644
--- a/src/knx/security_interface_object.cpp
+++ b/src/knx/security_interface_object.cpp
@@ -168,21 +168,6 @@ void SecurityInterfaceObject::secureApplicationLayer(SecureApplicationLayer& sec
     _secAppLayer = &secAppLayer;
 }
 
-uint8_t* SecurityInterfaceObject::save(uint8_t* buffer)
-{
-    return InterfaceObject::save(buffer);
-}
-
-const uint8_t* SecurityInterfaceObject::restore(const uint8_t* buffer)
-{
-    return InterfaceObject::restore(buffer);
-}
-
-uint16_t SecurityInterfaceObject::saveSize()
-{
-    return InterfaceObject::saveSize();
-}
-
 bool SecurityInterfaceObject::isLoaded()
 {
     return _state == LS_LOADED;
diff --git a/src/knx/security_interface_object.h b/src/knx/security_interface_object.h
index f3f76f4..cc27b45 100644
--- a/src/knx/security_interface_object.h
+++ b/src/knx/security_interface_object.h
@@ -17,10 +17,6 @@ public:
 
   void factoryReset();
 
-  uint8_t* save(uint8_t* buffer) override;
-  const uint8_t* restore(const uint8_t* buffer) override;
-  uint16_t saveSize() override;
-
   bool isLoaded();
 
   const uint8_t* toolKey(uint16_t devAddr);           // returns single tool key (ETS)