Safety system for preventing unauthorized manipulations in the case of the electronic text transmission in communication networks

摘要

The security system for preventing unauthorised manipulations in the electronic encrypted text transmission in communication networks has a plurality of subscriber stations and a security centre. In this connection, the individual user should be burdened as little as possible with the techniques and procedures required for this. This is achieved by means of an automatic dialling device which in each case establishes a connection between the security centre and the individual subscriber stations, in which arrangement the security centre in each case encrypts a connection code with the aid of a random bit converter generator. This then ensures that a message really originates from the transmitter specified and has not been altered and that the message has actually arrived at the receiver. IMAGE