US2738498A - Process for the automatic production of scrambled impulse and signal sequences - Google Patents

Process for the automatic production of scrambled impulse and signal sequences Download PDF

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Publication number
US2738498A
US2738498A US293705A US29370552A US2738498A US 2738498 A US2738498 A US 2738498A US 293705 A US293705 A US 293705A US 29370552 A US29370552 A US 29370552A US 2738498 A US2738498 A US 2738498A
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US
United States
Prior art keywords
generator
pulses
automatic production
impulses
impulse
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US293705A
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English (en)
Inventor
Liebknecht Werner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alcatel Lucent Deutschland AG
C Lorenz AG
Original Assignee
Standard Elektrik Lorenz AG
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Publication date
Application filed by Standard Elektrik Lorenz AG filed Critical Standard Elektrik Lorenz AG
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F7/00—Methods or arrangements for processing data by operating upon the order or content of the data handled
    • G06F7/58—Random or pseudo-random number generators
    • G06F7/588—Random number generators, i.e. based on natural stochastic processes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/06—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols the encryption apparatus using shift registers or memories for block-wise or stream coding, e.g. DES systems or RC4; Hash functions; Pseudorandom sequence generators
    • H04L9/065—Encryption by serially and continuously modifying data stream elements, e.g. stream cipher systems, RC4, SEAL or A5/3
    • H04L9/0656—Pseudorandom key sequence combined element-for-element with data sequence, e.g. one-time-pad [OTP] or Vernam's cipher
    • H04L9/0662—Pseudorandom key sequence combined element-for-element with data sequence, e.g. one-time-pad [OTP] or Vernam's cipher with particular pseudorandom sequence generator

Definitions

  • the complete assembly can be regarded as comprising two sections. generating non-systematic short electrical impulses, namely, the impulse transmitter.
  • Section 2 which is'-a valve trigger arrangement with two stable, end positions,' is operated by these impulses.
  • the control voltage Ust charges the condenser Cu and, through R1,, also the condenser Cm.
  • CLz is discharged.
  • the valve I continuously gen- Section 1 represents an. arrangement for erates additional sweep voltage impulses as long as the 7 key Ta is closed and as long as energy can still continue to flow from the condenser Cu to Cm after the key is opened.
  • the number of sweep voltage impulses generated by the valve I depends on a large number of other determining values as well as on the time 2, namely: upon the control voltage Ust, upon Cm, RA, Rn, Caz, CK, RK and above all upon all the momentary electrical working conditions of the relaxation Kipp oscillator valve I.
  • the number of the relaxation oscillation impulses generated is subjected to non systematicfiuctuations even when the time t is constant.
  • the time 2 when operating the arrangement in practice, the time 2 also undergoes small fluctuations when the key Ta is actuated rhythmically, so that in this way a further non-systematic variable is provided.
  • control voltage Ust is taken from the mains without stabilisation, the normal mains voltage fluctuation is obtained as a non-systematic variable. An even greater uncontrolled fluctuation is obtained if the output level of a noise generator (valve noise) or the noise of radioactive counting tube ampiifiers are also used for th control.
  • valve noise valve noise
  • radioactive counting tube ampiifiers are also used for th control.
  • the valve II which serves to amplify the voltage impulses, is acted upon by the relaxation oscillation valve I through the coupling condenser OK and the coupling resistance Rn.
  • the impulsing of the trigger arrangement which operates with the valves III and IV, is effected by the anode of the valve II.
  • one of the said valves III and IV is always, blocked by the negative grid biassing while the other is open. If an impulse occurs symmetrically on both grids, the blocked valve is opened thereby and the valve whichwas previously open is closed.
  • the trigger arrangement operates in the manner of an electrical dice, which swings rapidly backwards and forwards between its two end positions and finally, .according to the number of impulses acting thereon, remains stationary on even or odd.
  • the indicator relay R disposed in the anode circuit of the valves III' and IV positions its contact on positive or negative.
  • a complete five-unit or six-unit signal is also defined by 5 or 6 processes with one dice.
  • the operating speed is substantially only limited by the inertia of the indicating relay R, where the result is not indicated by inertia-free indicator elements such as glow-discharge lamps and the like.
  • the trigger device in the electrical dice is built up of two mutually blocking electron tubes or only of one or more ion tubes.
  • sequences of figures and letters derived with the electrical dice may be used in many ways as number tables for statistical investigations, as groups of figures or letters for the purpose of hand ciphering or they may be stamped in perforated tapes as five-unit signals for automatic ciphering and the like.
  • a random digit selecting system comprising a source of control voltage, a normally blocked generator, means associated with said source of control voltage to shockexcite said generator and cause it to deliver a short train of pulses per shock, whereby the number of said pulses amuse ⁇ J is"odd"or"even"at-random*dcpendingmn' momentarilrpre” vailing oscillating conditionsJof said generator, a counter circuit which is adapted to be controlled vdepending/as to whether the number ofjp'ulsesrofthepulsei'trains. applied is odd or even, and? means "applying said trains of pulses to said counter. circuit.
  • a random digit selecting system comprising'a random noise source, a normally" blocked; generator, .means applying the "output of. said. noise source to shock-excite said "generator and cause'it'to deliver a short train of pulses'per 'sho'ck,"wh'ereby'.the' number of saidpulses is odd or evenat random 'dependingonthe momentarily prevailing oscillating "conditions, a counter circuit which .is adapted'to be'controlle'd depending 'as'to whether the number of 'pulses'ofthe pulse trains "applied is. odd or evenyand means applying saidtrains of pulses to said counter circuit.
  • a random digit selecting system comprising a source of "control voltage, a normallybl'ocked generator, means associated 'With'said source” of. control. voltage to shockexcite said generator, and storage means between said source of control voltage andsaid generator, said storage means comprising a first branch condenser, a resistance shunting-said firstbr'an'ch condenser, a series resistance auda second branch condensenthe charging. capacity of 'said first' condenserbeing sufii'ciently high to excite said generator further for a short timeinterval afterthe actual shock from said source of control voltage.

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Analysis (AREA)
  • Pure & Applied Mathematics (AREA)
  • Mathematical Optimization (AREA)
  • General Engineering & Computer Science (AREA)
  • Computational Mathematics (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Catching Or Destruction (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Electrotherapy Devices (AREA)
US293705A 1952-04-02 1952-06-14 Process for the automatic production of scrambled impulse and signal sequences Expired - Lifetime US2738498A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH303841X 1952-04-02

Publications (1)

Publication Number Publication Date
US2738498A true US2738498A (en) 1956-03-13

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US293705A Expired - Lifetime US2738498A (en) 1952-04-02 1952-06-14 Process for the automatic production of scrambled impulse and signal sequences

Country Status (6)

Country Link
US (1) US2738498A (de)
BE (1) BE518896A (de)
CH (1) CH303841A (de)
DE (1) DE958933C (de)
FR (1) FR1073852A (de)
GB (1) GB750090A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3431430A (en) * 1964-11-18 1969-03-04 John Tambert Automatic electric control systems

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1022637B (de) * 1954-12-01 1958-01-16 Olivetti & Co Spa Verfahren zur Erzeugung einer Zeichenfolge mit zufallsmaessiger Verteilung der Zeichen, fuer Verschluesselungs- oder statistische Zwecke
NL131354C (de) * 1958-11-21
NL243225A (de) * 1958-11-24
GB1298451A (en) * 1961-02-02 1972-12-06 Tno Generator producing a quasi random series of zeroes and ones

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2406031A (en) * 1942-05-21 1946-08-20 Bell Telephone Labor Inc Telegraph ciphering key tape machine
US2415093A (en) * 1945-08-03 1947-02-04 Harry L Gerwin Signal generator
US2539014A (en) * 1949-02-16 1951-01-23 Walter J Frantz Random digit generator
US2585079A (en) * 1949-10-12 1952-02-12 British Telecomm Res Ltd Signal generator
US2612743A (en) * 1948-01-22 1952-10-07 Deering Milliken Res Trust Method and means for control of independently variable characteristics
US2637845A (en) * 1951-09-12 1953-05-05 Collins Radio Co Random signal generator

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2406031A (en) * 1942-05-21 1946-08-20 Bell Telephone Labor Inc Telegraph ciphering key tape machine
US2415093A (en) * 1945-08-03 1947-02-04 Harry L Gerwin Signal generator
US2612743A (en) * 1948-01-22 1952-10-07 Deering Milliken Res Trust Method and means for control of independently variable characteristics
US2539014A (en) * 1949-02-16 1951-01-23 Walter J Frantz Random digit generator
US2585079A (en) * 1949-10-12 1952-02-12 British Telecomm Res Ltd Signal generator
US2637845A (en) * 1951-09-12 1953-05-05 Collins Radio Co Random signal generator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3431430A (en) * 1964-11-18 1969-03-04 John Tambert Automatic electric control systems

Also Published As

Publication number Publication date
GB750090A (en) 1956-06-06
CH303841A (de) 1954-12-15
FR1073852A (fr) 1954-09-29
BE518896A (de)
DE958933C (de) 1957-02-28

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