GB1118671A - Reading device for cryptographic machine - Google Patents

Reading device for cryptographic machine

Info

Publication number
GB1118671A
GB1118671A GB882663A GB882663A GB1118671A GB 1118671 A GB1118671 A GB 1118671A GB 882663 A GB882663 A GB 882663A GB 882663 A GB882663 A GB 882663A GB 1118671 A GB1118671 A GB 1118671A
Authority
GB
United Kingdom
Prior art keywords
output
signal
elements
added
outputs
Prior art date
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
Application number
GB882663A
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.)
Philips USFA NV
Original Assignee
Philips USFA NV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Philips USFA NV filed Critical Philips USFA NV
Publication of GB1118671A publication Critical patent/GB1118671A/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09CCIPHERING OR DECIPHERING APPARATUS FOR CRYPTOGRAPHIC OR OTHER PURPOSES INVOLVING THE NEED FOR SECRECY
    • G09C1/00Apparatus or methods whereby a given sequence of signs, e.g. an intelligible text, is transformed into an unintelligible sequence of signs by transposing the signs or groups of signs or by replacing them by others according to a predetermined system
    • G09C1/06Apparatus or methods whereby a given sequence of signs, e.g. an intelligible text, is transformed into an unintelligible sequence of signs by transposing the signs or groups of signs or by replacing them by others according to a predetermined system wherein elements corresponding to the signs making up the clear text are operatively connected with elements corresponding to the signs making up the ciphered text, the connections, during operation of the apparatus, being automatically and continuously permuted by a coding or key member
    • G09C1/10Apparatus or methods whereby a given sequence of signs, e.g. an intelligible text, is transformed into an unintelligible sequence of signs by transposing the signs or groups of signs or by replacing them by others according to a predetermined system wherein elements corresponding to the signs making up the clear text are operatively connected with elements corresponding to the signs making up the ciphered text, the connections, during operation of the apparatus, being automatically and continuously permuted by a coding or key member the connections being electrical

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Complex Calculations (AREA)
  • Input From Keyboards Or The Like (AREA)

Abstract

1,118,671. Ciphering. PHILIPS USFA N.V. 5 March, 1963 [6 March, 1962], No. 8826/63. Heading G5X. [Also in Division H4] A ciphering device comprises a group of key elements which can be stepped and which provide a " zero " or a " one " output, and means for adding the sum of the key element outputs to the signal input to provide an output signal. In Fig. 1 four key elements 1-4 are stepped irregularly and each occupies one of a prime number of states which indicate a " zero " or a " one ", the states being read by reading devices 9-12. A signal source 44 supplies a signal, which is either zero or one, through switch 81 to a bi-stable device 41 which adds the signal to the output of element 1, the addition law being that like signals produce zero output and unlike signals a " one " output. Similarly the output of device 41 is added in unit 42 to the output of element 2, and so on to produce a ciphered output at 82. In a modification, Fig. 3 (not shown), the outputs of elements 2 and 3 are added together and then added to the output of device 41. In a further modification, Fig. 4 (not shown), the outputs of pairs of elements 1 and 2 and 3 and 4 are added together and the two sums are then added together, the total being added to the input signal. In another modification, Fig. 5 (not shown), each of the elements 1-4 is provided with five separate reading devices feeding five bi-stable devices so that five input signals in parallel can be ciphered simultaneously. Reversing switches can be used instead of bi-stable devices, Fig. 6 (not shown). In another arrangement, Fig. 7, the outputs of elements 1-4 are applied to " and " gates 65-68, to each of which the signal from source 44 is applied in turn through a distributer 70. The outputs of the gates are added by a counter 69 which changes its state on receipt of a " one " input and is unaffected by a " zero " input. At the end of a cycle a pulse is applied at C to allow the output of counter 69 to pass through unit 110 to the output 82. The ciphered text or the plain text may be applied at 81 to " and " gate 83; then if the text and the source 44 are both " one " the gate 83 will supply a " one " to counter 69.
GB882663A 1962-03-06 1963-03-05 Reading device for cryptographic machine Expired GB1118671A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL275586 1962-03-06

Publications (1)

Publication Number Publication Date
GB1118671A true GB1118671A (en) 1968-07-03

Family

ID=19753661

Family Applications (1)

Application Number Title Priority Date Filing Date
GB882663A Expired GB1118671A (en) 1962-03-06 1963-03-05 Reading device for cryptographic machine

Country Status (4)

Country Link
DK (1) DK100163A (en)
FR (1) FR1587308A (en)
GB (1) GB1118671A (en)
NO (1) NO129227B (en)

Also Published As

Publication number Publication date
FR1587308A (en) 1970-03-20
DK100163A (en) 1982-04-28
NO129227B (en) 1974-03-11

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