GB8605985D0 - Copy protecting computer programmes - Google Patents

Copy protecting computer programmes

Info

Publication number
GB8605985D0
GB8605985D0 GB8605985A GB8605985A GB8605985D0 GB 8605985 D0 GB8605985 D0 GB 8605985D0 GB 8605985 A GB8605985 A GB 8605985A GB 8605985 A GB8605985 A GB 8605985A GB 8605985 D0 GB8605985 D0 GB 8605985D0
Authority
GB
United Kingdom
Prior art keywords
protecting computer
copy protecting
computer programmes
programmes
copy
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Withdrawn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
GB8605985A
Other versions
GB2173327A (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.)
Phillips D A
Original Assignee
Phillips D A
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 Phillips D A filed Critical Phillips D A
Publication of GB8605985D0 publication Critical patent/GB8605985D0/en
Publication of GB2173327A publication Critical patent/GB2173327A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/70—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer
    • G06F21/78—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure storage of data
    • G06F21/80—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure storage of data in storage media based on magnetic or optical technology, e.g. disks with sectors
    • 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
    • G11B20/00572—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which change the format of the recording medium
    • G11B20/00586—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which change the format of the recording medium said format change concerning the physical format of the recording medium
    • 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
    • G11B20/00659—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a control step which is implemented as an executable file stored on the record carrier
    • 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
    • G11B20/0092—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which are linked to media defects or read/write errors
    • G11B20/00927—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which are linked to media defects or read/write errors wherein said defects or errors are generated on purpose, e.g. intended scratches

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Software Systems (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Management Or Editing Of Information On Record Carriers (AREA)
GB8605985A 1985-03-15 1986-03-11 Copy protecting computer programs Withdrawn GB2173327A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8506701 1985-03-15

Publications (2)

Publication Number Publication Date
GB8605985D0 true GB8605985D0 (en) 1986-04-16
GB2173327A GB2173327A (en) 1986-10-08

Family

ID=10576024

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8605985A Withdrawn GB2173327A (en) 1985-03-15 1986-03-11 Copy protecting computer programs

Country Status (1)

Country Link
GB (1) GB2173327A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3720233A1 (en) * 1987-06-12 1988-12-22 Thomas Keese Copy protection for data processing programs
JPH0375827A (en) * 1989-08-18 1991-03-29 Toshiba Corp Copy prevention device

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2401459A1 (en) * 1977-08-26 1979-03-23 Cii Honeywell Bull PORTABLE INFORMATION MEDIA EQUIPPED WITH A MICROPROCESSOR AND A PROGRAMMABLE DEAD MEMORY
DE3319343A1 (en) * 1982-11-08 1984-05-10 Vault Corp METHOD AND DEVICE FOR THE IMPOSSIBILITY OF UNAUTHORIZED COPIES OF RECORDED DATA
EP0109504A3 (en) * 1982-11-18 1987-03-25 International Business Machines Corporation Protection system for storage and input/output facilities and the like
EP0110511B1 (en) * 1982-11-22 1988-03-02 Dysan Corporation Method and apparatus for authenticating memory disk
IL68989A (en) * 1983-06-15 1985-03-31 Amiran Grynberg Diskette protection
GB2142765A (en) * 1983-07-04 1985-01-23 John William Hawkins Preventing unauthorised use of recorded information
US4577289A (en) * 1983-12-30 1986-03-18 International Business Machines Corporation Hardware key-on-disk system for copy-protecting magnetic storage media

Also Published As

Publication number Publication date
GB2173327A (en) 1986-10-08

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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)