A common-key blockcipher processing configuration with enhanced immunity against attacks such as saturation attacks and algebraic attacks is realized. The metering pump is preferably a valveless rotary piston pump, and for the color changer a suitably miniaturized arrangement and construction for the valve assemblies is preferred. The calculation section calculates an error detection code of each divided bitstream output from the division section. By such an arrangement, the signal level in the simulation device may be reduced so far that this can be designed as an integrated circuit and to be programmable.