DK170266B1 - Chifreringssystem og fremgangsmåde til chifrering og dechifrering - Google Patents

Chifreringssystem og fremgangsmåde til chifrering og dechifrering Download PDF

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Publication number
DK170266B1
DK170266B1 DK060188A DK60188A DK170266B1 DK 170266 B1 DK170266 B1 DK 170266B1 DK 060188 A DK060188 A DK 060188A DK 60188 A DK60188 A DK 60188A DK 170266 B1 DK170266 B1 DK 170266B1
Authority
DK
Denmark
Prior art keywords
bits
bit
ciphertext
register
output
Prior art date
Application number
DK060188A
Other languages
Danish (da)
English (en)
Other versions
DK60188A (da
DK60188D0 (da
Inventor
Toshihisa Nakai
Original Assignee
Oki Electric Ind Co Ltd
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 Oki Electric Ind Co Ltd filed Critical Oki Electric Ind Co Ltd
Publication of DK60188D0 publication Critical patent/DK60188D0/da
Publication of DK60188A publication Critical patent/DK60188A/da
Application granted granted Critical
Publication of DK170266B1 publication Critical patent/DK170266B1/da

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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
    • H04L9/06—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
    • H04L9/0618—Block ciphers, i.e. encrypting groups of characters of a plain text message using fixed encryption transformation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
    • H04L2209/12—Details relating to cryptographic hardware or logic circuitry

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Storage Device Security (AREA)
DK060188A 1987-02-13 1988-02-05 Chifreringssystem og fremgangsmåde til chifrering og dechifrering DK170266B1 (da)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP62029885A JPH0727325B2 (ja) 1987-02-13 1987-02-13 暗号化装置
JP2988587 1987-02-13

Publications (3)

Publication Number Publication Date
DK60188D0 DK60188D0 (da) 1988-02-05
DK60188A DK60188A (da) 1988-08-14
DK170266B1 true DK170266B1 (da) 1995-07-17

Family

ID=12288428

Family Applications (1)

Application Number Title Priority Date Filing Date
DK060188A DK170266B1 (da) 1987-02-13 1988-02-05 Chifreringssystem og fremgangsmåde til chifrering og dechifrering

Country Status (8)

Country Link
US (1) US4760600A (fr)
EP (1) EP0278170B1 (fr)
JP (1) JPH0727325B2 (fr)
CN (1) CN1008142B (fr)
CA (1) CA1295052C (fr)
DE (1) DE3786910T2 (fr)
DK (1) DK170266B1 (fr)
FI (1) FI874664A (fr)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2204465B (en) * 1987-05-01 1991-06-19 Philips Electronic Associated A method of and an arrangement for digital signal encryption
US5128996A (en) * 1988-12-09 1992-07-07 The Exchange System Limited Partnership Multichannel data encryption device
US5123047A (en) * 1988-12-09 1992-06-16 The Exchange System Limited Partnership Method of updating encryption device monitor code in a multichannel data encryption system
US4997288A (en) * 1988-12-09 1991-03-05 The Exchange System Limited Partnership Power supply arrangement for fault-tolerant operation in a microcomputer-based encryption system
BE1003932A6 (fr) * 1989-04-28 1992-07-22 Musyck Emile Systeme cryptographique par bloc de donnees binaires.
US5003596A (en) * 1989-08-17 1991-03-26 Cryptech, Inc. Method of cryptographically transforming electronic digital data from one form to another
EP0498343A3 (en) * 1991-02-07 1993-06-09 Siemens Aktiengesellschaft Method for preventing use of illicitly modified data and circuit for implementing said method
JP3180836B2 (ja) * 1992-05-21 2001-06-25 日本電気株式会社 暗号通信装置
ES2078178B1 (es) * 1993-12-31 1998-02-01 Alcatel Standard Electrica Dispositivo de cifrado de datos.
JP3029381B2 (ja) * 1994-01-10 2000-04-04 富士通株式会社 データ変換装置
AU693719B2 (en) * 1995-09-05 1998-07-02 Mitsubishi Denki Kabushiki Kaisha Data transformation apparatus and data transformation method
US6122379A (en) * 1996-05-30 2000-09-19 Deloitte & Touche Inc. Method and apparatus for performing simultaneous data compression and encryption
GB9903900D0 (en) 1999-02-19 1999-04-14 Digital Gramaphone And Wireles Data encoding/decoding device and apparatus using the same
US6947560B1 (en) * 1999-04-26 2005-09-20 Telefonaktiebolaget L M Ericsson (Publ) Method and device for effective key length control
JP2001211154A (ja) * 2000-01-25 2001-08-03 Murata Mach Ltd 秘密鍵生成方法，暗号化方法及び暗号通信方法
JP2001211155A (ja) * 2000-01-25 2001-08-03 Murata Mach Ltd 共通鍵生成方法，共通鍵生成装置及び暗号通信方法
JP5084224B2 (ja) * 2006-10-23 2012-11-28 Ｋｄｄｉ株式会社 自己同期型ストリーム暗号の暗号化装置、復号化装置、自己同期型ストリーム暗号システム、ｍａｃ生成装置、暗号化方法、復号化方法、ｍａｃ生成方法およびプログラム
WO2014182286A1 (fr) 2013-05-07 2014-11-13 Empire Technology Development, Llc Cryptage et décryptage rapides de données

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US30957A (en) * 1860-12-18 Improved steam-boiler
NL267662A (fr) * 1960-08-02
NL302458A (fr) * 1963-01-30
DE1911175C3 (de) * 1969-03-05 1982-03-11 Aktiebolaget Transvertex, Varby Chiffriereinrichtung
US3798360A (en) * 1971-06-30 1974-03-19 Ibm Step code ciphering system
US3796830A (en) * 1971-11-02 1974-03-12 Ibm Recirculating block cipher cryptographic system
US3784743A (en) * 1972-08-23 1974-01-08 Bell Telephone Labor Inc Parallel data scrambler
US3911216A (en) * 1973-12-17 1975-10-07 Honeywell Inf Systems Nonlinear code generator and decoder for transmitting data securely
US4255811A (en) * 1975-03-25 1981-03-10 International Business Machines Corporation Key controlled block cipher cryptographic system
DE2706421C2 (de) * 1977-02-16 1979-03-15 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Verfahren zum Einstellen von Schlüsseltextgeneratoren in Chiffriergeräten
US4172213A (en) * 1977-11-17 1979-10-23 Burroughs Corporation Byte stream selective encryption/decryption device
JPS593912B2 (ja) * 1979-09-12 1984-01-26 株式会社日立製作所 デ−タ変換方法
US4375579A (en) * 1980-01-30 1983-03-01 Wisconsin Alumni Research Foundation Database encryption and decryption circuit and method using subkeys
CH648167A5 (en) * 1980-02-14 1985-02-28 Gretag Ag Method and device for encryption and decryption of data
US4447672A (en) * 1980-10-06 1984-05-08 Nippon Electric Co., Ltd. Device for encrypting each input data bit by at least one keying bit decided by a code pattern and a bit pattern of a predetermined number of preceding encrypted bits
US4663500A (en) * 1982-02-22 1987-05-05 Nec Corporation Cryptographic system
US4668103A (en) * 1982-04-30 1987-05-26 Wilson William J Polygraphic encryption-decryption communications system
US4596898A (en) * 1984-03-14 1986-06-24 Computer Security Systems, Inc. Method and apparatus for protecting stored and transmitted data from compromise or interception

Also Published As

Publication number Publication date
CA1295052C (fr) 1992-01-28
DK60188A (da) 1988-08-14
FI874664A (fi) 1988-08-14
EP0278170A3 (en) 1989-10-18
CN87107370A (zh) 1988-08-24
EP0278170B1 (fr) 1993-08-04
CN1008142B (zh) 1990-05-23
EP0278170A2 (fr) 1988-08-17
DE3786910T2 (de) 1994-01-27
FI874664A0 (fi) 1987-10-22
JPS63198090A (ja) 1988-08-16
JPH0727325B2 (ja) 1995-03-29
US4760600A (en) 1988-07-26
DE3786910D1 (de) 1993-09-09
DK60188D0 (da) 1988-02-05

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Legal Events

Date Code Title Description
B1 Patent granted (law 1993)
PBP Patent lapsed