GB2272560B - Writing of a second set of data in dependence upon reading a first set of data - Google Patents

Writing of a second set of data in dependence upon reading a first set of data

Info

Publication number
GB2272560B
GB2272560B GB9223923A GB9223923A GB2272560B GB 2272560 B GB2272560 B GB 2272560B GB 9223923 A GB9223923 A GB 9223923A GB 9223923 A GB9223923 A GB 9223923A GB 2272560 B GB2272560 B GB 2272560B
Authority
GB
United Kingdom
Prior art keywords
data
dependence
writing
reading
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 - Lifetime
Application number
GB9223923A
Other versions
GB2272560A (en
GB9223923D0 (en
Inventor
Edward Philip White
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.)
Thorn Secure Science Ltd
Original Assignee
Thorn Secure Science 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 Thorn Secure Science Ltd filed Critical Thorn Secure Science Ltd
Priority to GB9223923A priority Critical patent/GB2272560B/en
Publication of GB9223923D0 publication Critical patent/GB9223923D0/en
Publication of GB2272560A publication Critical patent/GB2272560A/en
Application granted granted Critical
Publication of GB2272560B publication Critical patent/GB2272560B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/16—Digital recording or reproducing using non self-clocking codes, i.e. the clock signals are either recorded in a separate clocking track or in a combination of several information tracks
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/08—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means
    • G06K19/10—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means at least one kind of marking being used for authentication, e.g. of credit or identity cards
    • G06K19/12—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means at least one kind of marking being used for authentication, e.g. of credit or identity cards the marking being sensed by magnetic means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q20/00—Payment architectures, schemes or protocols
    • G06Q20/30—Payment architectures, schemes or protocols characterised by the use of specific devices or networks
    • G06Q20/34—Payment architectures, schemes or protocols characterised by the use of specific devices or networks using cards, e.g. integrated circuit [IC] cards or magnetic cards
    • G06Q20/347—Passive cards
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07F—COIN-FREED OR LIKE APPARATUS
    • G07F7/00—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus
    • G07F7/08—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by coded identity card or credit card or other personal identification means
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07F—COIN-FREED OR LIKE APPARATUS
    • G07F7/00—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus
    • G07F7/08—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by coded identity card or credit card or other personal identification means
    • G07F7/12—Card verification
    • G07F7/125—Offline card verification
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/00884—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a watermark, i.e. a barely perceptible transformation of the original data which can nevertheless be recognised by an algorithm

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Business, Economics & Management (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Accounting & Taxation (AREA)
  • Strategic Management (AREA)
  • General Business, Economics & Management (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
GB9223923A 1992-11-14 1992-11-14 Writing of a second set of data in dependence upon reading a first set of data Expired - Lifetime GB2272560B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9223923A GB2272560B (en) 1992-11-14 1992-11-14 Writing of a second set of data in dependence upon reading a first set of data

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9223923A GB2272560B (en) 1992-11-14 1992-11-14 Writing of a second set of data in dependence upon reading a first set of data

Publications (3)

Publication Number Publication Date
GB9223923D0 GB9223923D0 (en) 1993-01-06
GB2272560A GB2272560A (en) 1994-05-18
GB2272560B true GB2272560B (en) 1996-07-17

Family

ID=10725109

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9223923A Expired - Lifetime GB2272560B (en) 1992-11-14 1992-11-14 Writing of a second set of data in dependence upon reading a first set of data

Country Status (1)

Country Link
GB (1) GB2272560B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU736556B2 (en) * 1997-11-10 2001-08-02 Thorn Secure Science Limited A method of labelling an article
CN102446525B (en) * 2010-09-30 2015-04-22 山东新北洋信息技术股份有限公司 Magnetic recording method and equipment

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2186732A (en) * 1986-01-15 1987-08-19 Uniqey Improvements in encoding magnetic cards
US5028768A (en) * 1988-09-27 1991-07-02 Societe Anonyme Dite: Compagnie Generale D'automatise Cga Hbs System for reading and encoding a magnetic track carried by a manually-displaced supporting document

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2186732A (en) * 1986-01-15 1987-08-19 Uniqey Improvements in encoding magnetic cards
US5028768A (en) * 1988-09-27 1991-07-02 Societe Anonyme Dite: Compagnie Generale D'automatise Cga Hbs System for reading and encoding a magnetic track carried by a manually-displaced supporting document

Also Published As

Publication number Publication date
GB2272560A (en) 1994-05-18
GB9223923D0 (en) 1993-01-06

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PE20 Patent expired after termination of 20 years

Expiry date: 20121113