A clamping device for temporarily clamping the fabric in place is provided on the weaving machine, and interacts with a ventilating device that effects the temporary elimination of the clamping action. The pointer may include random data that is of a same data type as the sensitive data. The stacking may occur in the frequency or time domains. Encryption keys unique for each memory address of the memory are generated. The power amplifier is capable of operating at a very low quiescent current level, for example, 5 mA. The present invention refers furthermore to a process for their production and to product compositions comprising them.