| 摘要 |
For simpler and more flexible input of information into computer systems with secure signalling via input devices with secure signalling, in which, for verification, displays with secure signalling and command-enabling keys with secure signalling are operated, according to the invention it is proposed that the input device is divided into a part with secure signalling and a part without secure signalling which is connected in series before it, that all information passes through the insecure part, whether input via it or processed into commands, and that all information and commands are automatically tested in the part with secure signalling for secure signalling relevance. If they are not relevant to security, they are passed directly to a control logic unit of the system, and the additional command security procedure is only required if they are relevant to security. A particular advantage is that modifications of the input and output processes can be implemented while minimising the part with secure signalling, using modifiable devices with insecure structure, without requiring additional testing. <IMAGE> |
