DE958933C - Arrangement for generating signal sequences whose individual signals, statistically distributed, bear one of two possible, predetermined criteria - Google Patents

Description

In practical statistics, e.g. B. for random checks in mass production and For the purposes of encryption, signal sequences are required to an ever increasing extent, whose: egg-cell signals unsystematic, random carry one of two possible predetermined criteria.

Until now, these consequences were Liehe very umständ ^L and time-consuming way, mostly by hand made, was being rarely achieve a really good random even distribution especially in the derivation of hand.

A method was therefore developed that produces signal sequences of this type completely automatically and its technical structure is so simple and clear that it can also be used continuously In practice, the random distribution of the derived consequences is ensured.

An exemplary embodiment of the invention is described in more detail below.

The overall structure can be divided into two parts. Part ι represents an arrangement for generating unsystematic, short electrical impulses, the impulse transmitter. With the help of these pulses part 2, a tube tilting arrangement with two stable ones End positions, triggered.

In detail, the following mode of operation results from the exemplary embodiment: When the key Ta is actuated, the control voltage U _{st charges} the capacitor C _Ll and, via R _L, also O _L2 .

If the voltage at C _{L2 reaches} the ignition voltage of the oscillating tube I, then! C _L2 discharged. The tube I continues to generate breakover voltage surges as long as the key Ta is closed and S as long as energy can _flow to C Lz from the capacitor C _{Ll after the key has been opened.}

If the button Ta is pressed for a certain time t , the number of breakdown voltage surges that the pipe I generates depends not only on the time t but also on a large number of other parameters: on the control voltage U _sl , on C _Lv Ra>Rl> Ci ₂ , C \, Rk and above all from the current total electrical working conditions of the tilting oscillating tube I. From this large number of unsystematic variables it follows that with repeated actuation of Ta, even at a constant time t, the number of oscillating vibrations generated is unsystematic so is subject to fluctuations. In practical embodiment ¹ , there is also the fact that when the key Ta is pressed rhythmically, the time t is also subject to slight fluctuations, so that a further unsystematic variable is thus given. If the control voltage U _{si is} taken from the network without stabilization, the normal network voltage fluctuations are obtained as unsystematic variables. You get an even bigger random, moderate fluctuation if you use the output level of a noise generator (Röbreni; rauschen) or the noise of radioactive counter \ tube amplifiers for control.

As the tests have shown, the great technical effort involved is not necessary because it does not result in any improvement in the random distribution for the entire arrangement. the unsystematic fluctuations in the other determinants of the pulse generator are sufficient) Security off.

.40 From the tilting oscillating _{tube I, the tube II is pushed through the coupling capacitor C K} and the coupling resistance ¹ R ^ , which serves to amplify the voltage surges.

The tilting arrangement, which works with the tubes III and IV, is triggered from the anode of the tube II. According to the circuit structure, one of these tubes is always locked by negative grid biasing while the other is open. If an impact occurs symmetrically on both grids, the blocked pipe is opened ¹ and the previously opened pipe is blocked. If, accordingly, an even number of pulses is given to the tilting arrangement when the button Ta is pressed, the tilting arrangement is again in its initial position after the pulses have elapsed. An uneven number of pulses, on the other hand, causes a new end position.

In conjunction with the impulse from the pulse transmitter, the tilting arrangement works like a Kind of "electric cube" that swings back and forth very quickly between its two end positions and ' finally, depending on the number of trigger impulses, remains on "even" or "odd".

Depending on the location of the tilt assembly which is in the anode circuit of the tubes III and IV display relay R puts his contact "Plus" or "Minus".

If the key Ta is systematically actuated by some technical control arrangement, one obtains an unsystematic, randomly distributed sequence of "plus" and "minus" values due to the unsystematic scatter of the pulse transmitter.

It is only a task of normal circuit technology to simultaneously actuate five or six or any number of the "electrical cubes" from the Ta key. B. a full five or six characters of the telex, ie a number or a letter to set.

A complete five or six character is also made by rolling five or six dice determined with a dice one after the other.

Since the electrical tube circuits have only a very low inertia, the operating speed is essentially only limited by the inertia of the display relay R , as long as the result of the dice is not displayed by more inert display elements such as glow lamps, etc.

In tests, up to 500 dice could be per second. In the five-digit code, this corresponds to 100 letters or digits per second.

For the technical design and the functioning of the electric cube, it is of no importance whether for the generation of electrical impulses ion tube tilting arrangements or equivalent Electron tube circuits can be used. Likewise, it has no influence on the working i °° wise whether the tilting device in the electric cube consists of two mutually blocking electron tubes is built up or only from one or more ion tubes.

The t ° 5 derived with the electric cube Signal sequences can be used in many ways: to form number tables for statistical Investigations on the formation of groups of digits or letters for the purpose of Hamdver; schlüssel'liung, as five characters in punched tape! punched for automatic encryption etc.

Claims (3)

Patent claims: i. Arrangement for generating signal sequences whose individual signals are statistically distributed wear one of two possible predetermined criteria, e.g. B. Pulse trains with pulses positive or negative polarity, as it is particularly important for the formation of which should offer the highest level of security against unauthorized decryption are, characterized in that a normally at rest electrical Tilting vibration generator (I) is provided, the frequency of which in the oscillation was due to the natural fluctuations of the variables that determine them, in particular the tilting threshold of the tilting vibration generator, varied statistically and therefore, on short-term impulses (touching the Ta key) provides vibrations with a statistically varying number of Ekizel vibrations, that also a tilting arrangement with two stable Location is provided to which the ίο vibrating trains are switched on so that under their effect, it oscillates back and forth between the two stable positions to finally Randomly - depending on whether the applied oscillation train is an even or an odd one Contains number of single oscillations - to remain in one of its two stable positions, and 'that when the end positions caused by successive impacts are reached, a pulse is triggered each time, depending on the end position, one of two arbitrary criteria (e.g. positive or negative Polarity). 2. Arrangement according to claim 1, characterized in that that with one keying several, preferably five or six, arrangements according to claim 1 switched on at the same time and therefore simultaneously five or six final values »plus« and with one keying "Minus" are determined in a random distribution, d. H. a full five or five Six characters of telex technology. 3. Arrangement according to claim 1, characterized in that the pruning results in known punched tapes of telex technology are fixed, with which · -datim locking devices can be controlled automatically. Considered publications:
U.S. Patent Nos. 2406031, 2539014. 1 sheet of drawings © 60 $ 617/184 8.56 (609 809 2.57)