Method and configuration for the transmission of signals from generating functional units to processing functional units of electrical circuits
First Claim
1. A method for the transmission of signals from generating functional units to processing functional units of electrical circuits, characterized in that the signals to be transmitted are coded and/or modulated after being emitted by the generating functional unit (1), and decoded and/or demodulated before being received by the processing functional unit (3).
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Abstract
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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Citations
20 Claims
- 1. A method for the transmission of signals from generating functional units to processing functional units of electrical circuits, characterized in that the signals to be transmitted are coded and/or modulated after being emitted by the generating functional unit (1), and decoded and/or demodulated before being received by the processing functional unit (3).
- 10. A configuration for the transmission of signals from generating functional units to processing functional units of electrical circuits, characterized in that at least one means for coding/decoding and/or modulation/demodulation of the signals to be transmitted from a generating functional unit (1) to a processing functional unit (3) of an electrical circuit is arranged between the generating functional unit (1) and the processing functional unit (3).
Specification