Abstract: Domestic appliance arrangement having a domestic appliance, which can communicate in accordance with a domestic appliance communication protocol, and an interface coupling device which is coupled to the domestic appliance. The interface coupling device includes a first interface, which provides communication in accordance with the domestic appliance communication protocol, a second interface, which provides communication in accordance with a semantic communication protocol, and a protocol conversion unit for mapping data encoded in accordance with the domestic appliance communication protocol onto data which encoded in accordance with the semantic communication protocol and/or for mapping data encoded in accordance with the semantic communication protocol onto data encoded in accordance with the domestic appliance communication protocol.

Abstract: A method for generating at least one cryptographic key is provided in which several devices are each exposed to the same environmental conditions, the devices, taking into account the environmental conditions, each determine a value for a same physical quantity, and the devices each generate a cryptographic key by using the respective value of the physical quantity determined by the devices.