| 摘要 |
The invention pertains to an input security and transactions unit as well as a process therefor. The aim of the invention is to guarantee the validity of the information for the user, that is for the sender and the receiver of the message. Particular importance is attached to arriving at a cost-effective solution, one which should not entail modifying or replacing any parts of the computer. The invention achieves this aim in that the data input via the keyboard (1) can be conveyed through the keyboard cable (2) into the specially closed circuit system (3) and becomes available to the temporary information memory (8) through the interface unit (4); the information (12) is given a signature (13), whereupon the resulting data block can be output from the closed circuit (3) through the interface unit (4) via the bus system (10) so that, depending on the request, the information (12) can either be received exclusively by the keyboard (1) via the keyboard cable (2) or simultaneously forwarded to the keyboard input of the PC (15) via the keyboard extension cable (14). |
