IT1039491B - Sistema di sicurezza per la memorizzazione di informazioni - Google Patents

Sistema di sicurezza per la memorizzazione di informazioni

Info

Publication number
IT1039491B
IT1039491B IT24777/75A IT2477775A IT1039491B IT 1039491 B IT1039491 B IT 1039491B IT 24777/75 A IT24777/75 A IT 24777/75A IT 2477775 A IT2477775 A IT 2477775A IT 1039491 B IT1039491 B IT 1039491B
Authority
IT
Italy
Prior art keywords
security system
storing information
storing
security
information
Prior art date
Application number
IT24777/75A
Other languages
English (en)
Original Assignee
Sperry Rand Corp
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 Sperry Rand Corp filed Critical Sperry Rand Corp
Application granted granted Critical
Publication of IT1039491B publication Critical patent/IT1039491B/it

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/08—Error detection or correction by redundancy in data representation, e.g. by using checking codes
    • G06F11/10—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's
    • G06F11/1008—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's in individual solid state devices
    • G06F11/1012—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's in individual solid state devices using codes or arrangements adapted for a specific type of error
    • G06F11/1016—Error in accessing a memory location, i.e. addressing error
    • 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
    • G06F12/1458—Protection against unauthorised use of memory or access to memory by checking the subject access rights

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Security & Cryptography (AREA)
  • Quality & Reliability (AREA)
  • Detection And Correction Of Errors (AREA)
  • Storage Device Security (AREA)
  • Error Detection And Correction (AREA)
IT24777/75A 1974-08-19 1975-06-25 Sistema di sicurezza per la memorizzazione di informazioni IT1039491B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US498824A US3920976A (en) 1974-08-19 1974-08-19 Information storage security system

Publications (1)

Publication Number Publication Date
IT1039491B true IT1039491B (it) 1979-12-10

Family

ID=23982653

Family Applications (1)

Application Number Title Priority Date Filing Date
IT24777/75A IT1039491B (it) 1974-08-19 1975-06-25 Sistema di sicurezza per la memorizzazione di informazioni

Country Status (5)

Country Link
US (1) US3920976A (it)
JP (1) JPS5145934A (it)
DE (1) DE2536498A1 (it)
FR (1) FR2282676A1 (it)
IT (1) IT1039491B (it)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4839117A (it) * 1971-09-21 1973-06-08
GB1536853A (en) * 1975-05-01 1978-12-20 Plessey Co Ltd Data processing read and hold facility
US4087856A (en) * 1976-06-30 1978-05-02 International Business Machines Corporation Location dependence for assuring the security of system-control operations
DE2655653C2 (de) * 1976-12-08 1982-12-16 Siemens AG, 1000 Berlin und 8000 München Anordnung zur Feststellung der richtigen Zuordnung von Adresse und Speicherwort in einem wortorganisierten Datenspeicher
US4241396A (en) * 1978-10-23 1980-12-23 International Business Machines Corporation Tagged pointer handling apparatus
US4244049A (en) * 1979-02-02 1981-01-06 Burroughs Corporation Method and apparatus for enhancing I/O transfers in a named data processing system
JPS58139399A (ja) * 1982-02-15 1983-08-18 Hitachi Ltd 半導体記憶装置
US4943967A (en) * 1982-02-15 1990-07-24 Hitachi, Ltd. Semiconductor memory with an improved dummy cell arrangement and with a built-in error correction code circuit
US5177743A (en) * 1982-02-15 1993-01-05 Hitachi, Ltd. Semiconductor memory
US4521852A (en) * 1982-06-30 1985-06-04 Texas Instruments Incorporated Data processing device formed on a single semiconductor substrate having secure memory
US4521853A (en) * 1982-06-30 1985-06-04 Texas Instruments Incorporated Secure microprocessor/microcomputer with secured memory
FR2661532A1 (fr) * 1990-04-26 1991-10-31 Sgs Thomson Microelectronics Memoire a acces protege mot par mot.
EP0501760B1 (en) * 1991-02-27 1998-09-23 Canon Kabushiki Kaisha Method for detecting improper rewriting of stored data
DE69225828T2 (de) * 1991-02-27 1998-11-12 Canon Kk Verfahren zur Entdeckung inkorrekter Überschreibung gespeicherter Daten
US5440731A (en) * 1991-03-15 1995-08-08 Canon Kabushiki Kaisha Method of detecting unjustifiable reloading of stored data
US5652837A (en) * 1993-03-22 1997-07-29 Digital Equipment Corporation Mechanism for screening commands issued over a communications bus for selective execution by a processor

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1250163B (de) * 1961-11-22 1967-09-14 Western Electric Company, Incorporated, New York, NY (V St A) Einrichtung zur Paritätsprüfung von Speicherworten

Also Published As

Publication number Publication date
JPS5145934A (it) 1976-04-19
DE2536498A1 (de) 1976-03-04
US3920976A (en) 1975-11-18
FR2282676A1 (fr) 1976-03-19
FR2282676B1 (it) 1979-05-18

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