1. A device for processing data, comprising: an input interface for receiving input data; a processing unit for processing data; and an encoding unit for encoding data words which are obtained as input data at the input interface in order to obtain encoded data words, wherein the encoding unit is configured to encode the data words in such a way that a predefined portion of measured values which characterize at least one of the encoded data words and processing of the encoded data words by the device has a difference from a default value, the measured values being ascertained as a function of at least one physical variable of the device, and the difference being less than or equal to a predefined threshold value, and wherein the encoding unit executes an encoding rule for encoding the data words as a function of at least one encoding parameter, and wherein the processing unit processes the encoded data words.