| 摘要 |
a) System for pairing up in a specific manner a pointer or input control peripheral, and a computer facility (1) furnished with a screen. b) System for pairing up in a specific manner a peripheral and a computer facility (1) furnished with a screen, characterised in that it includes at least one additional internal electronic circuit (5) laid out in the computer facility (1) in such a way that the control signals for the peripheral (2) can be taken into account by the said computer facility only in so far as the additional electronic circuit of the computer facility recognizes a given signal originating from the peripheral. c) This system makes it possible to prevent access to confidential data and, especially, the introduction of "computer viruses". <IMAGE>
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