DE1802399C

DE1802399C - Process for the automatic ciphering and deciphering of signal impulses

Info

Publication number: DE1802399C
Application number: DE19681802399
Authority: DE
Inventors: Cato Bergen Seeberg (Norwegen)
Original assignee: A/S Lehmkuhl, Oslo
Priority date: 1967-11-09
Filing date: 1968-10-10
Publication date: 1973-08-23

Description

signal 2/ gibt. Der Komparator 17 umfaßt einen Verschlüsselungskreis, der unterbrochen ist, wenn zwei Signale dieselbe Polarität besitzen, und der geschlossen ist, wenn die Polarität verschieden ist. Die Impulsreihe 2/ steuert einen Niederfrequenzoszillator 18, dessen Ausgangssignal den Klartext repräsentiert, der abgehört werden kann.signal 2 / gives. The comparator 17 includes one Encryption circuit, which is broken when two signals have the same polarity, and the is closed when the polarity is different. The pulse train 2 / controls a low frequency oscillator 18, the output signal of which represents the plain text that can be listened to.

Der Kodeapparat ist primär für Simplex-Verkehr bestl.iimt, wobei der Apparat, wie beschrieben, durch den Schalter 20, 21 von Senden auf Empfang umgeschaltet wird. Es wird vorausgesetzt, daß die Station, mit der man in Verkehr steht, einen entsprechenden Kodeapparat besitzt. Der Frequenzstandard 1 in den beiden Kodeapparaten wird gewährleisten, dal? die Impulsfrequenz auf beiden Seiten sehr nahe dieselbe ist Synchronisierung und liinphasung erfolgen automatisch dadurch, daß die empfangene Impulsreihe 2; von dem Detektorkreis 16 auch einem Komparator 8 zugeführt wird, der automatisch die Impulsfrequenz und Phase der empfangenen Station mit dem impulsgenerator der Senderstation synchronisiert. Die Schaltersektion 21 ist während der Sendung offen und beim Empfang geschlossen, und sie bildet zusammen mit der Schaltersektion 20 eine Schaltereinheit für Sendung/Empfang.The code apparatus is primarily intended for simplex traffic, whereby the apparatus, as described, is switched by the switch 20, 21 from transmission to reception. It is assumed that the Station with which one is in communication has a corresponding code apparatus. The frequency standard 1 in the two code machines will ensure that? the pulse frequency on both sides very close to the same is synchronization and phase-in-phase automatically due to the fact that the received pulse train 2; from the detector circuit 16 is also fed to a comparator 8, which automatically the pulse frequency and phase of the receiving station with the pulse generator of the Synchronized transmitter station. The switch section 21 is open during transmission and when receiving closed, and together with the switch section 20 it forms a switch unit for transmission / reception.

Bei Etablieren des Verkehrs ist der Kodegenerator 9 durch den Torkreis 6 blockiert. Das ausgesendete Signal besteht dann aus regelmäßigen Impulsen, wird aber in dem Komparator 17 zu normalen Verschlüsselungszeichen umgeformt werden. Die Aussendung ist »scrambled«, aber nicht chiffriert. Um die Kodegeneratoren anzulassen, muß die Senderstation ein bestimmtes Startsignal senden, das auf der Empfängerstation dem Kontrollkreis 7 zugeführt wird. Dieser ist unbeeinflußbar von anderen Signalen und wird erst dann in Funktion treten, wenn er das bestimmte Startsignal empfängt. Dadurch öffnet der Torkreis 6, so daß der Kodegenerator startet. Auf der Senderstation werden (bei Sendung) eigene chriffrierte Verschlüsseluimssianale über die Schalter-Sektion 21 dem Komparator 17 zugeführt werden. Dadurch werden eigene Signale (zwecks Kontrolle)When the traffic is established, the code generator 9 is blocked by the gate circuit 6. That sent out The signal then consists of regular pulses, but becomes normal encryption characters in the comparator 17 be reshaped. The broadcast is "scrambled" but not encrypted. In order to start the code generators, the transmitter station must send a certain start signal, which is on the receiving station is fed to the control circuit 7. This cannot be influenced by other signals and will only come into operation when it receives the specific start signal. This opens the gate circuit 6, so that the code generator starts. On the sender station (when broadcast) own Encrypted encryption channels via the switch section 21 are fed to the comparator 17. This will generate your own signals (for control purposes)

ίο dekodiert und abgehört werden können, und ebenfalls wird das Startsignal dem Kontrollkreis 7 auch auf der Senderstation zugeführt werden, so daß die Kodegeneratoren gleichzeitig auf Sender- und Empfängerstation starten. Die zulässige Zeitspanne ist bedeutend größer als die Übertraglingszeit \on Sender zu Empfängerίο can be decoded and intercepted, and likewise the start signal will also be fed to the control circuit 7 on the transmitter station, so that start the code generators at the same time on the transmitter and receiver station. The allowable amount of time is significantly greater than the transmission time \ from sender to receiver

Der Kodegenerator muß Impulse variierender Länge unterbrochen von Pausen Hefern, die auch variierender Länge sir *. Die Impulsreihe darf nicht nach einem bestimmten Svstem aufgebaut sein, d. h., nicht von Regelmäßigkeit oder Periodizität geprägt sein. Zwecks Erzeugung der Kodesignale ist Verwendung eines Zählregisters mit derart vielen Kombinationsmöglichkeiten denkbar, daß Wiederholung derselben Kodegruppe vermieden wird.The code generator must have pulses of varying length interrupted by breaks yeast, which are also varying length sir *. The pulse series must not be structured according to a specific system, d. i.e. not characterized by regularity or periodicity being. A counting register with so many possible combinations is used to generate the code signals conceivable that repetition of the same code group is avoided.

Es ist zu bemerken, daß jedes beliebige Signal, das mit Hilfe des beschriebenen Verfahrens ausgesendet wird, zu einer jeden beliebigen Reihenfolge von Morse/.eichen durch Benutzung variierender Kodemuster für Dechiffrieren, umgebildet werden kann. Wenn man das benutzte Kodemuster nicht kennt, ist es daher praktisch unmöglich, die richtige Lösung zu finden.It should be noted that any signal transmitted using the method described becomes, to any arbitrary order of Morse / .eichen by using varying Code pattern for deciphering, can be remodeled. If you don't use the code pattern knows, it is therefore practically impossible to find the right solution.

Hierzu 1 Blatt Zeichnungen1 sheet of drawings

Claims

1 21 2

This is achieved according to the invention in that

Claim: a series of "alternating positive and" regular

negative impulses, the following leading impulses

Processes for automatic ciphering and nanni are each a fraction of the shortest deciphering of signal pulses of the same or 5 signal pulses or space between unequal length and distribution in the ratio of signal pulses, in an irregular pattern to each other, thereby identifying ac, in a manner known per se by means of a code that a series of regular, alternately positive-controlled inverters are inverted., and that the tive and negative pulses (2b), hereinafter referred to as the resulting series of inverted and non-conductive pulses, each a fraction of i ° inverted conductive pulses on the transmitter side of one of the shortest clear signal pulse (2c) or inverter, which is controlled by a clear signal pulse generator between clear signal pulses, so that the leader creates an irregular pattern in per se known pulses, as long as the inverter receives a signal pulse ter way with the help of a code-controlled in- fed will be inverted, whereupon the verters (5) are inverted, and that the 15 resulting series of lead pulses for keying the resulting series of inverted and non- the transmitter is used, and that the series of inverted lead pulses (2 c) on the Transmitter side and non-inverted pilot pulses to which an inverter (11) is fed, which is fed from the receiver side to a decoder, controlled by a Kiarsignalimpulsgeber (12), according to a corresponding pattern, the received, so that the pilot pulses as long as a clear signal - 20 coded signals to decipher,
pulse is fed to the inverter (11), the invention will be described below with reference to FIG.

Series of control pulses (2g) for keying in FIG. 1 shows a block diagram for a system transmitter (14) is used, and that the series for carrying out the method;
inverted and non-inverted leading pulses (2 e) 25 Fig. 2 shows various Si ^ nalkurvenforms;
On the receiver side a decoder (10) for FIG. 3 shows schematically how the start of the code is carried out in order to demean the encrypted signals received according to a corresponding pattern generator in a system according to FIG. 1.

to encrypt. In Fig. 1, a stable low frequency gene provides

30 rator 3, controlled by a frequency standard 1, a sine wave la of z. B. 100 Hz, the one

Differentiator 4 is supplied, the one

Pulse series 2b with alternating positive and negative, very narrow pulses, as well as one

The present invention relates to a method 35 series 2c with only positive, very narrow pulses for automatic encryption and decryption supplies. The last-mentioned series of pulses 2c is converted into a code generator 9 in signal pulses of equal and unequal length: i Generation of the code and distribution in relation to one another. character 2 d is used, and the first-mentioned pulse ciphering and deciphering of such signal series 2 b happens one of the code generator pulses is usually for cryptographirxhen 4 ° controlled inverter, so that the pulses only teletype service carried out by inverting the periods , in which the plain text message is fed to the inverter 5 on the sender side with a code signal 2 d. The key material is processed. At the receiver located e ^r imaging pulse train is 2 e catcher page in transmission are then received, encryption of the other inverter 11 th through the switch section 20 signals with a corresponding key 45, respectively. Inverter 11 is controlled by a Morse code for the purpose of recovering the plaintext message, so that inversion is only processed. The encryption and decryption when the key 12 is closed (2 /), and this takes place in that the plain text message or the inverter 11 delivers a pulse-received encrypted signal in this way to a crypto series 2g, which has a key unit 13 for the transmitter 14 Apparat in the form of an electromechanical control 50, with a positive pulse being fed to the key circuit coding device, which closes by, which is not interrupted again before the encryption material arrives in the form of a negative pulse, and the key characters an agreed pattern perforated tape mate - 2 Λ control the transmitter 14, whose output signal 21 rials are controlled, which is fed to the transmitter and the transmitter antenna.
Must run synchronously on the receiving end. These systems 55. Upon receipt, the switch 21 is set so that signal pulses of a certain shape and the same - the code-inverted pulses of the decoding gene-like length, such as. B. Teletype rator 10 are supplied. The signal 21, that of characters, consisting of 5 character units. The purpose of the invention is to provide a method to which it passes the receiver 15 and the sound creation, whereby automatic (on-line) encryption ⁶ ° frequency of z. B. 2 kHz has reproduced, in and deciphering of signal pulses regardless of the filtered and rectified by the detector circuit 16, length and grouping of the signal pulses, and so that the signal has the form 2 /. The impulse without being transformed into signals with a certain series ^,! the shape and length supplied by the first inverter is carried out, is fed to the decoding generator 10, can be carried out. The method can thus be used in the same way as the transmitter probe unit 13 for signal pulses, as acts at and thereby generates a pulse series 2 k , Morse telegraphy, where the length and distribution together with the pulse rate 2 / a comparator the impulses can vary significantly. 17 is supplied to which a resulting output