GB1120031A - Device for stepping a group of key elements of cryptographic apparatus having an irregular sequence of steps - Google Patents

Device for stepping a group of key elements of cryptographic apparatus having an irregular sequence of steps

Info

Publication number
GB1120031A
GB1120031A GB4896162A GB4896162A GB1120031A GB 1120031 A GB1120031 A GB 1120031A GB 4896162 A GB4896162 A GB 4896162A GB 4896162 A GB4896162 A GB 4896162A GB 1120031 A GB1120031 A GB 1120031A
Authority
GB
United Kingdom
Prior art keywords
elements
adder
driving mechanism
stepping
modulo
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
GB4896162A
Other languages
English (en)
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 GB1120031A publication Critical patent/GB1120031A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09C—CIPHERING OR DECIPHERING APPARATUS FOR CRYPTOGRAPHIC OR OTHER PURPOSES INVOLVING THE NEED FOR SECRECY
    • G09C1/00—Apparatus 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
    • G09C1/06—Apparatus 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Stepping Motors (AREA)
  • Steroid Compounds (AREA)
GB4896162A 1961-12-29 1962-12-28 Device for stepping a group of key elements of cryptographic apparatus having an irregular sequence of steps Expired GB1120031A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL273047 1961-12-29

Publications (1)

Publication Number Publication Date
GB1120031A true GB1120031A (en) 1968-07-17

Family

ID=19753506

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4896162A Expired GB1120031A (en) 1961-12-29 1962-12-28 Device for stepping a group of key elements of cryptographic apparatus having an irregular sequence of steps

Country Status (5)

Country Link
DK (1) DK564262A (enExample)
FR (1) FR1584201A (enExample)
GB (1) GB1120031A (enExample)
NL (2) NL105818C (enExample)
NO (1) NO129226B (enExample)

Also Published As

Publication number Publication date
NL105818C (enExample)
NO129226B (enExample) 1974-03-11
FR1584201A (enExample) 1969-12-19
NL273047A (enExample)
DK564262A (da) 1982-04-28

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