ZA802984B - Cepher apparatus synchronisation checking - Google Patents

Cepher apparatus synchronisation checking

Info

Publication number
ZA802984B
ZA802984B ZA00802984A ZA802984A ZA802984B ZA 802984 B ZA802984 B ZA 802984B ZA 00802984 A ZA00802984 A ZA 00802984A ZA 802984 A ZA802984 A ZA 802984A ZA 802984 B ZA802984 B ZA 802984B
Authority
ZA
South Africa
Prior art keywords
cepher
synchronisation
checking
synchronisation checking
cepher apparatus
Prior art date
Application number
ZA00802984A
Inventor
W Markwitz
Original Assignee
Siemens Ag
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 Siemens Ag filed Critical Siemens Ag
Publication of ZA802984B publication Critical patent/ZA802984B/en

Links

Classifications

    • 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
    • H04L9/12—Transmitting and receiving encryption devices synchronised or initially set up in a particular manner
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Storage Device Security (AREA)
  • Selective Calling Equipment (AREA)
  • Electrophonic Musical Instruments (AREA)
ZA00802984A 1979-05-21 1980-05-20 Cepher apparatus synchronisation checking ZA802984B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2920589A DE2920589C2 (en) 1979-05-21 1979-05-21 Method and circuit arrangement for checking the synchronism of two key devices

Publications (1)

Publication Number Publication Date
ZA802984B true ZA802984B (en) 1981-05-27

Family

ID=6071346

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA00802984A ZA802984B (en) 1979-05-21 1980-05-20 Cepher apparatus synchronisation checking

Country Status (5)

Country Link
EP (1) EP0019756B1 (en)
DE (1) DE2920589C2 (en)
DK (1) DK179380A (en)
NO (1) NO801475L (en)
ZA (1) ZA802984B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8201077A (en) * 1982-03-16 1983-10-17 Philips Nv A COMMUNICATION SYSTEM, CONTAINING A CENTRAL DATA PROCESSING DEVICE, ACCESS STATIONS AND EXTERNAL STATIONS, WHICH A CRYPTOGRAPHIC CHECK IS FORDICULARIZING AN EXTERNAL STATION, AND EXTERNAL STATIONS FOR USE IN SUCH A COMMUNITY.
DE3484245D1 (en) * 1984-05-29 1991-04-11 Siemens Ag METHOD AND ARRANGEMENT FOR MONITORING THE SYNCHRONOUS RUN OF KEY DEVICES.
DE3825880C1 (en) * 1988-07-29 1995-12-21 Siemens Ag Key device
DE4023534C1 (en) * 1990-07-25 1991-11-21 Siemens Ag, 8000 Muenchen, De

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2463502A (en) * 1942-05-21 1949-03-08 Tung Sol Lamp Works Inc Method and system of secret communication
DE1255705B (en) * 1966-01-12 1967-12-07 Telefunken Patent Circuit arrangement for the secure transmission of binary coded data according to the echo method
US3798605A (en) * 1971-06-30 1974-03-19 Ibm Centralized verification system
DE2631823C3 (en) * 1976-07-15 1984-03-01 ANT Nachrichtentechnik GmbH, 7150 Backnang Method for synchronizing key devices for data transmission systems
US4193131A (en) * 1977-12-05 1980-03-11 International Business Machines Corporation Cryptographic verification of operational keys used in communication networks

Also Published As

Publication number Publication date
NO801475L (en) 1980-11-24
DE2920589B1 (en) 1980-08-14
EP0019756A1 (en) 1980-12-10
DE2920589C2 (en) 1981-06-11
DK179380A (en) 1980-11-22
EP0019756B1 (en) 1983-03-30

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