| 摘要 |
The invention relates to a method and a configuration for the transmission of signals from generating functional units to processing functional units of electrical circuits, which can be used to prevent the interception of information being exchanged between two functional units that are located separately in the layout. The sensitive signal is formed by a functional unit. Instead of passing this signal on directly to a processing functional unit, it is gated with a reference signal formed by a signal generator. These circuit components are located close together in the layout, so the sensitive circuit is short. The coded signal is passed to the next block. This connection may be long. Once it has arrived at the next block, an identical reference signal is formed. The signal generator used for this purpose is not of identical design with the first one, so a hacker cannot recognize the similarity. The sensitive signal is reproduced with the reference signal. A monitoring circuit can check whether the regenerated signal is "plausible". If not, a hacking attempt can be assumed.
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