Securing the IoT poses specific challenges which are still only partially solved. These include the often very limited computing, storage, and energy resources of wirelessly connected IoT devices, the high demands on the user-friendliness, as well as the high-cost pressure. Upon this background, the research project PROPHYLAXE (“Providing Physical Layer Security for the Internet of Things”), funded by the BMBF, pursued a novel approach in which the physical properties of the wireless transmission link between two devices are exploited. Based on these properties, cryptographic keys can be generated that are known only to the communicating devices and can be used to secure and authenticate a connection.
