GB0222201D0 - Cipher apparatus - Google Patents

Cipher apparatus

Info

Publication number
GB0222201D0
GB0222201D0 GB0222201A GB0222201A GB0222201D0 GB 0222201 D0 GB0222201 D0 GB 0222201D0 GB 0222201 A GB0222201 A GB 0222201A GB 0222201 A GB0222201 A GB 0222201A GB 0222201 D0 GB0222201 D0 GB 0222201D0
Authority
GB
United Kingdom
Prior art keywords
cipher apparatus
cipher
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.)
Withdrawn
Application number
GB0222201A
Other versions
GB2380916A (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.)
HW COMM Ltd
Original Assignee
HW COMM 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 HW COMM Ltd filed Critical HW COMM Ltd
Publication of GB0222201D0 publication Critical patent/GB0222201D0/en
Publication of GB2380916A publication Critical patent/GB2380916A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • G06F7/582—Pseudo-random number generators
    • G06F7/584—Pseudo-random number generators using finite field arithmetic, e.g. using a linear feedback shift register
    • 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2207/00—Indexing scheme relating to methods or arrangements for processing data by operating upon the order or content of the data handled
    • G06F2207/58—Indexing scheme relating to groups G06F7/58 - G06F7/588
    • G06F2207/582—Parallel finite field implementation, i.e. at least partially parallel implementation of finite field arithmetic, generating several new bits or trits per step, e.g. using a GF multiplier
    • 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)
  • Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Computational Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Pure & Applied Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Logic Circuits (AREA)
GB0222201A 2001-09-28 2002-09-25 Pseudo random stream cipher generator comprising shift registers where the shifting of the registers at each clock is dependent upon the register state Withdrawn GB2380916A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0123302A GB0123302D0 (en) 2001-09-28 2001-09-28 Cipher apparatus

Publications (2)

Publication Number Publication Date
GB0222201D0 true GB0222201D0 (en) 2002-10-30
GB2380916A GB2380916A (en) 2003-04-16

Family

ID=9922839

Family Applications (2)

Application Number Title Priority Date Filing Date
GB0123302A Ceased GB0123302D0 (en) 2001-09-28 2001-09-28 Cipher apparatus
GB0222201A Withdrawn GB2380916A (en) 2001-09-28 2002-09-25 Pseudo random stream cipher generator comprising shift registers where the shifting of the registers at each clock is dependent upon the register state

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB0123302A Ceased GB0123302D0 (en) 2001-09-28 2001-09-28 Cipher apparatus

Country Status (1)

Country Link
GB (2) GB0123302D0 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100459493C (en) * 2005-12-29 2009-02-04 北京浦奥得数码技术有限公司 Stream cipher generator, random digit generation method, encrypting system and encryption method

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2130412B (en) * 1982-02-19 1986-02-05 John Wolfgang Halpern Electronic money purse
CH668340A5 (en) * 1985-10-17 1988-12-15 Bbc Brown Boveri & Cie GENERATOR FOR GENERATING BINARY CIFFERENTIAL SEQUENCES.
FR2619976A1 (en) * 1987-09-01 1989-03-03 Mouly Michel Very long pseudo-random character sequence generator
US6014446A (en) * 1995-02-24 2000-01-11 Motorola, Inc. Apparatus for providing improved encryption protection in a communication system
JP2830842B2 (en) * 1996-06-05 1998-12-02 日本電気株式会社 Pseudo random number generator
JP2937919B2 (en) * 1997-01-16 1999-08-23 日本電気アイシーマイコンシステム株式会社 Pseudo random number generator
US6009135A (en) * 1997-10-10 1999-12-28 Interdigtal Technology Corporation Method and apparatus for generating a stream cipher

Also Published As

Publication number Publication date
GB2380916A (en) 2003-04-16
GB0123302D0 (en) 2001-11-21

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)