GB2248702B - Data-processing apparatus - Google Patents

Data-processing apparatus

Info

Publication number
GB2248702B
GB2248702B GB9022160A GB9022160A GB2248702B GB 2248702 B GB2248702 B GB 2248702B GB 9022160 A GB9022160 A GB 9022160A GB 9022160 A GB9022160 A GB 9022160A GB 2248702 B GB2248702 B GB 2248702B
Authority
GB
United Kingdom
Prior art keywords
data
processing apparatus
processing
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
GB9022160A
Other versions
GB2248702A (en
GB9022160D0 (en
Inventor
Barry Redmond
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.)
Viserge Ltd
Original Assignee
Viserge 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 Viserge Ltd filed Critical Viserge Ltd
Priority to GB9022160A priority Critical patent/GB2248702B/en
Publication of GB9022160D0 publication Critical patent/GB9022160D0/en
Publication of GB2248702A publication Critical patent/GB2248702A/en
Application granted granted Critical
Publication of GB2248702B publication Critical patent/GB2248702B/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G06F21/71—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure computing or processing of information
    • G06F21/75—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure computing or processing of information by inhibiting the analysis of circuitry or operation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F12/00—Accessing, addressing or allocating within memory systems or architectures
    • G06F12/14—Protection against unauthorised use of memory or access to memory
    • G06F12/1408—Protection against unauthorised use of memory or access to memory by using cryptography
GB9022160A 1990-10-11 1990-10-11 Data-processing apparatus Expired - Lifetime GB2248702B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9022160A GB2248702B (en) 1990-10-11 1990-10-11 Data-processing apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9022160A GB2248702B (en) 1990-10-11 1990-10-11 Data-processing apparatus

Publications (3)

Publication Number Publication Date
GB9022160D0 GB9022160D0 (en) 1990-11-21
GB2248702A GB2248702A (en) 1992-04-15
GB2248702B true GB2248702B (en) 1994-11-02

Family

ID=10683593

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9022160A Expired - Lifetime GB2248702B (en) 1990-10-11 1990-10-11 Data-processing apparatus

Country Status (1)

Country Link
GB (1) GB2248702B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19922155A1 (en) * 1999-05-12 2000-11-23 Giesecke & Devrient Gmbh Memory arrangement and memory access procedure for microcomputers has an additional scrambling step to increase data security, for use in financial applications etc.
GB2376775B (en) * 2001-03-28 2005-05-04 Shansun Technology Company Data protection system with address re-mapping mechanism for the protected zone of storage devices or media

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1601627A (en) * 1977-03-11 1981-11-04 Kearney & Trecker Corp Computer software security system
GB2099616A (en) * 1981-06-03 1982-12-08 Jpm Automatic Machines Ltd Improvements relating to microprocessor units
WO1983004356A1 (en) * 1982-05-21 1983-12-08 General Computer Company Software protection methods and apparatus
US4583196A (en) * 1983-10-28 1986-04-15 Honeywell Inc. Secure read only memory
GB2172721A (en) * 1985-03-21 1986-09-24 John Angus Robertson Protective software

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1601627A (en) * 1977-03-11 1981-11-04 Kearney & Trecker Corp Computer software security system
GB2099616A (en) * 1981-06-03 1982-12-08 Jpm Automatic Machines Ltd Improvements relating to microprocessor units
WO1983004356A1 (en) * 1982-05-21 1983-12-08 General Computer Company Software protection methods and apparatus
US4583196A (en) * 1983-10-28 1986-04-15 Honeywell Inc. Secure read only memory
GB2172721A (en) * 1985-03-21 1986-09-24 John Angus Robertson Protective software

Also Published As

Publication number Publication date
GB2248702A (en) 1992-04-15
GB9022160D0 (en) 1990-11-21

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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: 20101010