GB2112971B - Data protection system - Google Patents

Data protection system

Info

Publication number: GB2112971B
Authority: GB; United Kingdom
Prior art keywords: protection system; data protection; data; protection
Prior art date: 1981-12-15
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

Application number

GB08137787A

Other versions

GB2112971A (en

Inventor

Jonathan Baldachin

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.)

LITTLE GENIUS Ltd

Original Assignee

LITTLE GENIUS 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.)

1981-12-15

Filing date

1981-12-15

Publication date

1985-10-02

1981-12-15 Application filed by LITTLE GENIUS Ltd filed Critical LITTLE GENIUS Ltd

1981-12-15 Priority to GB08137787A priority Critical patent/GB2112971B/en

1983-07-27 Publication of GB2112971A publication Critical patent/GB2112971A/en

1985-10-02 Application granted granted Critical

1985-10-02 Publication of GB2112971B publication Critical patent/GB2112971B/en

Status Expired legal-status Critical Current

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
- G11B20/00086—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
- G11B20/00615—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 logical format of the recording medium, e.g. the structure of sectors, blocks, or frames
- 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
- G11B20/00094—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which result in a restriction to authorised record carriers
- G11B20/00123—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which result in a restriction to authorised record carriers the record carrier being identified by recognising some of its unique characteristics, e.g. a unique defect pattern serving as a physical signature of the record carrier
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2211/00—Indexing scheme relating to details of data-processing equipment not covered by groups G06F3/00 - G06F13/00
- G06F2211/007—Encryption, En-/decode, En-/decipher, En-/decypher, Scramble, (De-)compress

Landscapes

Engineering & Computer Science (AREA)
Computer Security & Cryptography (AREA)
Signal Processing (AREA)
Signal Processing For Digital Recording And Reproducing (AREA)

GB08137787A 1981-12-15 1981-12-15 Data protection system Expired GB2112971B (en)

Priority Applications (1)

Application Number	Priority Date	Filing Date	Title
GB08137787A GB2112971B (en)	1981-12-15	1981-12-15	Data protection system

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
GB08137787A GB2112971B (en)	1981-12-15	1981-12-15	Data protection system

Publications (2)

Publication Number	Publication Date
GB2112971A GB2112971A (en)	1983-07-27
GB2112971B true GB2112971B (en)	1985-10-02

Family

ID=10526622

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
GB08137787A Expired GB2112971B (en)	1981-12-15	1981-12-15	Data protection system

Country Status (1)

Country	Link
GB (1)	GB2112971B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE3320378A1 (en) *	1982-06-07	1983-12-15	Fortune Systems Corp	PROGRAM PROTECTION DEVICE FOR COMPUTER PROGRAMS
US4578722A (en) *	1982-12-23	1986-03-25	International Business Machines Corporation	Method for checking disk identity in a flexible disk recorder
GB8323283D0 (en) *	1983-08-31	1983-10-05	Univ Strathclyde	Copyright protection device
US4823210A (en) *	1984-08-13	1989-04-18	Verbatim Corporation	Copy protected disk
JPH0616345B2 (en) *	1984-12-19	1994-03-02	ティーディーケイ株式会社	Method of discriminating duplicated product of magnetic recording medium, apparatus therefor, and method of preventing duplicated product reading
FR2713796B1 (en) *	1993-12-10	1996-03-01	Metavideotex Sa	Method for protecting a group of computer workstations and device for implementing it.
DE69636842T2 (en)	1995-06-30	2007-10-18	Sony Corp.	Data recording method and apparatus, recording medium, data reproducing method and apparatus

1981
- 1981-12-15 GB GB08137787A patent/GB2112971B/en not_active Expired

Also Published As

Publication number	Publication date
GB2112971A (en)	1983-07-27

Publication	Publication Date	Title
GB2108298B (en)	1985-09-04	Data processing system
JPS57209555A (en)	1982-12-22	Data processing system
JPS57211657A (en)	1982-12-25	Data processing system
IL64675A0 (en)	1982-03-31	Data verification system
GB8420735D0 (en)	1984-09-19	Semiconductor-memory system
JPS57174746A (en)	1982-10-27	Data processing system
ZA817032B (en)	1982-11-24	Inermittent data system
ZA827293B (en)	1983-08-31	Security system
IL63879A0 (en)	1981-12-31	Data processing system
JPS57153344A (en)	1982-09-21	Data processing system
DE3279694D1 (en)	1989-06-15	Data communication system
MY8600740A (en)	1986-12-31	Trasportation system
JPS57180247A (en)	1982-11-06	Data processing system
DE3278336D1 (en)	1988-05-19	Computer system
IL65772A (en)	1985-04-30	Linked data systems
JPS57130159A (en)	1982-08-12	Computer system
JPS57157687A (en)	1982-09-29	Data processing system
DE3277423D1 (en)	1987-11-05	Data processing system
DE3270597D1 (en)	1986-05-22	Data processing system
GB2108722B (en)	1986-02-26	Pen-lift system
GB2097286B (en)	1984-08-30	Hemiodialysis system
GB2093990B (en)	1985-05-22	Spectroanalytical system
EP0114368A3 (en)	1987-05-06	Data protection system
GB2102996B (en)	1985-04-17	Security system
DE3279145D1 (en)	1988-11-24	Data communication system

Legal Events

Date	Code	Title	Description
1986-06-04	732	Registration of transactions, instruments or events in the register (sect. 32/1977)
1988-08-10	PCNP	Patent ceased through non-payment of renewal fee