Achieving Software Security for Measuring Instruments under Legal Control

In recent years measuring instruments have adopted general-purpose operating systems to offer the user a broader functionality that is not necessarily restricted towards measurement alone. Additionally the trend to the internet of things from which measuring instruments are not immune, e.g. smart meters and traffic enforcement cameras just to name a few, brings forth security questions. In this paper, a flexible software system architecture that can be constructed out of freely available open source software is presented which addresses these challenges within the framework of essential requirements laid down in the Measuring Instruments Directive of the European Union. The system architecture is based on a modular design assuring correct collaboration between modules by encapsulating them in different virtual machines and supervising their communication.