During the production process or when components are replaced during servicing, forged components may be installed in embedded systems. Since counterfeits of many components are in circulation, this can also happen unintentionally. Counterfeit components often work less reliably than the original components. As a result, functions may fail or work incorrectly. Attackers may also develop a device or component that looks exactly the same as the original, but contains manipulated functions. Such components could create backdoors, manipulate individual functions, or reduce availability, for example.