GB1154387A - Digital Computing Systems - Google Patents
Digital Computing SystemsInfo
- Publication number
- GB1154387A GB1154387A GB54900/66A GB5490066A GB1154387A GB 1154387 A GB1154387 A GB 1154387A GB 54900/66 A GB54900/66 A GB 54900/66A GB 5490066 A GB5490066 A GB 5490066A GB 1154387 A GB1154387 A GB 1154387A
- Authority
- GB
- United Kingdom
- Prior art keywords
- block
- protected
- programme
- write
- control
- 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
Links
Classifications
-
- 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
- G06F12/1491—Protection against unauthorised use of memory or access to memory by checking the subject access rights in a hierarchical protection system, e.g. privilege levels, memory rings
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Storage Device Security (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US519347A US3377624A (en) | 1966-01-07 | 1966-01-07 | Memory protection system |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1154387A true GB1154387A (en) | 1969-06-04 |
Family
ID=24067911
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB54900/66A Expired GB1154387A (en) | 1966-01-07 | 1966-12-08 | Digital Computing Systems |
Country Status (9)
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2230881A (en) * | 1989-04-28 | 1990-10-31 | Christopher William Cowsley | Data storage protection |
Families Citing this family (41)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3781811A (en) * | 1967-09-14 | 1973-12-25 | Tokyo Shibaura Electric Co | Memory protective systems for computers |
US3573736A (en) * | 1968-01-15 | 1971-04-06 | Ibm | Interruption and interlock arrangement |
US3576544A (en) * | 1968-10-18 | 1971-04-27 | Ibm | Storage protection system |
US3573855A (en) * | 1968-12-31 | 1971-04-06 | Texas Instruments Inc | Computer memory protection |
US3651475A (en) * | 1970-04-16 | 1972-03-21 | Ibm | Address modification by main/control store boundary register in a microprogrammed processor |
JPS4930578B1 (US20080293856A1-20081127-C00150.png) * | 1970-09-30 | 1974-08-14 | ||
US3725872A (en) * | 1971-03-03 | 1973-04-03 | Burroughs Corp | Data processing system having status indicating and storage means |
GB1414126A (en) * | 1971-11-22 | 1975-11-19 | Key Tronic Ltd | Secutity for computer systems |
US3825903A (en) * | 1973-04-30 | 1974-07-23 | Ibm | Automatic switching of storage protect keys |
US3893084A (en) * | 1973-05-01 | 1975-07-01 | Digital Equipment Corp | Memory access control system |
US4135240A (en) * | 1973-07-09 | 1979-01-16 | Bell Telephone Laboratories, Incorporated | Protection of data file contents |
FR2258112A5 (US20080293856A1-20081127-C00150.png) * | 1973-11-30 | 1975-08-08 | Honeywell Bull Soc Ind | |
US3916385A (en) * | 1973-12-12 | 1975-10-28 | Honeywell Inf Systems | Ring checking hardware |
US3890601A (en) * | 1974-03-11 | 1975-06-17 | Philco Ford Corp | Password operated system for preventing unauthorized or accidental computer memory alteration |
US4035779A (en) * | 1976-04-30 | 1977-07-12 | International Business Machines Corporation | Supervisor address key control system |
US4037214A (en) * | 1976-04-30 | 1977-07-19 | International Business Machines Corporation | Key register controlled accessing system |
US4099243A (en) * | 1977-01-18 | 1978-07-04 | Honeywell Information Systems Inc. | Memory block protection apparatus |
US4519032A (en) * | 1982-06-09 | 1985-05-21 | At&T Bell Laboratories | Memory management arrangement for microprocessor systems |
US4523271A (en) * | 1982-06-22 | 1985-06-11 | Levien Raphael L | Software protection method and apparatus |
JPS60107155A (ja) * | 1983-11-16 | 1985-06-12 | Hitachi Ltd | 記憶ボリユ−ムのデ−タ保護方式 |
US4633388A (en) * | 1984-01-18 | 1986-12-30 | Siemens Corporate Research & Support, Inc. | On-chip microprocessor instruction decoder having hardware for selectively bypassing on-chip circuitry used to decipher encrypted instruction codes |
JPS60160491A (ja) * | 1984-01-31 | 1985-08-22 | Toshiba Corp | Icカードとicカード発行装置 |
US4823308A (en) * | 1984-02-02 | 1989-04-18 | Knight Technology Ltd. | Microcomputer with software protection |
DE3731339A1 (de) * | 1987-09-15 | 1989-03-30 | Siemens Ag | Verfahren zur ueberwachung von speichereinrichtungen in digitalgesteuerten kommunikationssystemen |
US5748981A (en) * | 1992-10-20 | 1998-05-05 | National Semiconductor Corporation | Microcontroller with in-circuit user programmable microcode |
US5513337A (en) * | 1994-05-25 | 1996-04-30 | Intel Corporation | System for protecting unauthorized memory accesses by comparing base memory address with mask bits and having attribute bits for identifying access operational mode and type |
US6976258B1 (en) | 1999-11-30 | 2005-12-13 | Ensim Corporation | Providing quality of service guarantees to virtual hosts |
US6529985B1 (en) | 2000-02-04 | 2003-03-04 | Ensim Corporation | Selective interception of system calls |
US6711607B1 (en) | 2000-02-04 | 2004-03-23 | Ensim Corporation | Dynamic scheduling of task streams in a multiple-resource system to ensure task stream quality of service |
US6560613B1 (en) | 2000-02-08 | 2003-05-06 | Ensim Corporation | Disambiguating file descriptors |
US6754716B1 (en) | 2000-02-11 | 2004-06-22 | Ensim Corporation | Restricting communication between network devices on a common network |
US7343421B1 (en) | 2000-02-14 | 2008-03-11 | Digital Asset Enterprises Llc | Restricting communication of selected processes to a set of specific network addresses |
US6948003B1 (en) | 2000-03-15 | 2005-09-20 | Ensim Corporation | Enabling a service provider to provide intranet services |
US6985937B1 (en) | 2000-05-11 | 2006-01-10 | Ensim Corporation | Dynamically modifying the resources of a virtual server |
US6907421B1 (en) | 2000-05-16 | 2005-06-14 | Ensim Corporation | Regulating file access rates according to file type |
US7143024B1 (en) | 2000-07-07 | 2006-11-28 | Ensim Corporation | Associating identifiers with virtual processes |
US6909691B1 (en) | 2000-08-07 | 2005-06-21 | Ensim Corporation | Fairly partitioning resources while limiting the maximum fair share |
US6732211B1 (en) | 2000-09-18 | 2004-05-04 | Ensim Corporation | Intercepting I/O multiplexing operations involving cross-domain file descriptor sets |
US7219354B1 (en) | 2000-12-22 | 2007-05-15 | Ensim Corporation | Virtualizing super-user privileges for multiple virtual processes |
US6618736B1 (en) | 2001-03-09 | 2003-09-09 | Ensim Corporation | Template-based creation and archival of file systems |
US8261095B1 (en) | 2001-11-01 | 2012-09-04 | Google Inc. | Methods and systems for using derived user accounts |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3108257A (en) * | 1958-12-30 | 1963-10-22 | Ibm | Locking and unlocking of memory devices |
BE633719A (US20080293856A1-20081127-C00150.png) * | 1962-06-22 | |||
US3264615A (en) * | 1962-12-11 | 1966-08-02 | Ibm | Memory protection system |
US3271744A (en) * | 1962-12-31 | 1966-09-06 | Handling of multiple matches and fencing in memories | |
FR1379293A (fr) * | 1963-01-03 | 1964-11-20 | Western Electric Co | Procédé de détection d'erreurs dans les transferts au cours de traitements de données |
US3328765A (en) * | 1963-12-31 | 1967-06-27 | Ibm | Memory protection system |
US3328768A (en) * | 1964-04-06 | 1967-06-27 | Ibm | Storage protection systems |
-
1966
- 1966-01-07 US US519347A patent/US3377624A/en not_active Expired - Lifetime
- 1966-12-08 GB GB54900/66A patent/GB1154387A/en not_active Expired
- 1966-12-30 BE BE692036D patent/BE692036A/xx unknown
- 1966-12-30 DE DE1966I0003267 patent/DE1524183B1/de not_active Withdrawn
-
1967
- 1967-01-04 SE SE154/67A patent/SE322644B/xx unknown
- 1967-01-05 FR FR8266A patent/FR1507799A/fr not_active Expired
- 1967-01-05 ES ES0335302A patent/ES335302A1/es not_active Expired
- 1967-01-05 NL NL6700145A patent/NL6700145A/xx unknown
- 1967-01-06 CH CH15967A patent/CH452937A/de unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2230881A (en) * | 1989-04-28 | 1990-10-31 | Christopher William Cowsley | Data storage protection |
Also Published As
Publication number | Publication date |
---|---|
CH452937A (de) | 1968-03-15 |
US3377624A (en) | 1968-04-09 |
ES335302A1 (es) | 1967-12-01 |
NL6700145A (US20080293856A1-20081127-C00150.png) | 1967-07-10 |
BE692036A (US20080293856A1-20081127-C00150.png) | 1967-05-29 |
SE322644B (US20080293856A1-20081127-C00150.png) | 1970-04-13 |
FR1507799A (fr) | 1967-12-29 |
DE1524183B1 (de) | 1971-08-05 |
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