The present invention relates to a method and arrangement for providing access to a device, the method comprising: receiving via a touch surface information, at least partly comprising a graphical code, said code comprising at least two parts, a first part relating to a first physical value on said touch surface and a second part relating to a second physical value on said touch surface, and generating a graphical code based on said first and second physical values, said graphical code having at least one portion deviating from a plane extension of said touch surface.