Methof of providing secured data traffic in a computer

摘要

The invention relates to a method of providing secured data traffic in a computer network, which is provided with a central access control device and computers that are distributed and that can be connected and disconnected to the network, wherein each computer is provided with a key whose authenticity, previous two connecting the computer in the network is checked by the access control device, in order to either authorize or refuse connection. The key of each computer is secret and is only present in the respective computer, in that from this key the computer derives a public key with an algorithm preseeded in the computer that is also present in the access control device, in that the public key is sent by that computer to the access control device which processes the received public key in the algorithm into a check value, in that the access control device sends a check key to the computer that in accordance with the algorithm processes the check key together with the key of that control device, and in that the access control device admits the computer to the network if the response is identical with the check value, and in that the algorithm is geared such that any result from the algorithm can be derived from a plurality of possible input parameters of the algorithm, whereas only the key computer into a response which the computer sends to the access present in the computer supplies the check value.