Apparatus for automatically enciphering and/or deciphering a test consisting of multidigit dual coded characters

Abstract

Abstract An apparatus for automatic enciphering and/or deciphering a text consisting of multidigit dual coded key characters supplied by a key character generator, comprising an adding device for dual addition of text characters and key characters. The adding device includes first inputs for introducing text characters, second inputs connected to the key character generator for introducing key characters, outputs for result characters obtained at each adding operation, and a transfer or carry output for transmission of a transfer signal when upon addition of the characters a transfer is obtained at the last digit. There is also provided a data processing device for digital signal sequences which is connected to the transfer or carry output, said data processing device being connected to said adding device ahead of said first or said second inputs, or following said outputs thereof, in order to modify the characters introduced into the data processing device in a definite manner, in accordance with a transfer or carry signal.

Inventors

• 👤 Sture Nyberg

Bibliographic Details