H - Electricity – 04 – L
Patent
H - Electricity
04
L
340/70
H04L 9/18 (2006.01)
Patent
CA 1106930
ABSTRACT OF THE DISCLOSURE An apparatus for the transmission end-enciphering and reception end-deciphering of information comprising an enciphering device arranged at the transmitter for receiving plain text in the form of information signal groups separated from one another by separation or partition signals. At the transmitter there is provided a controllable control circuit operatively connected with a key character-information storage. The control circuit, when activated, causing a change of the key character information entered by the key character-information storage to the enciphering device and due to such change replacing the separation signals between the information sig- nal groups by control signals representative of the key character-informa- tion. At the receiver there is provided a control circuit operatively con- nected with a further key character-information storage, this control circuit upon determination of the control signals indicative of a change of the key character-information causing a corresponding change of the key character- information delivered by such further key character-information storage to the deciphering device and which again replaces such control signals by the separation signals originally entered at the side of the transmitter, so that the signal sequence appearing at the output side of the deciphering device again corresponds to the signal sequence entered at the enciphering device.
298957
Anstalt Europaische Handelsgesellschaft
Smart & Biggar
LandOfFree
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