Method and apparatus for the encipherable transmission of a series of binary information signals with authenticity check

摘要

In the method, an authenticity recognition test is carried out for the transmitter and for the receiver by the non-linear combination of the sum of the series of binary characters using a secret authenticity identifier known only to the transmitter and receiver, the authenticity recognition generated by the transmitter being transmitted to the receiver after transmission of the series, and compared there with the authenticity recognition generated at the receiver, and the transmitted series of binary information characters being declared authentic in the event of agreement, and is characterised in that the secret authenticity identifier is formed by presetting the encryption program, in that the nonlinear combination of the sum of the series of binary information characters and the authenticity identifier is performed by the encryption program as an enciphering process, and in that as authenticity recognition test the sum of the series of binary characters thus enciphered is transmitted to the receiver, decoded there and compared to the sum formed from the received series of binary information characters. IMAGE