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Protection ring

In computer science, hierarchical protection domains, often called protection rings, are mechanisms to protect data and functionality from faults (by improving fault tolerance) and malicious behavior (by providing computer security).

Applications & Science

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Overview

Implementations

Modes

Privilege level

Use of hardware features

Advanced semantic analysis

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Map overview Semantic statistics

Protection ring

Nodes91
Edges90
Triples130
Avg. degree1.98
Density0.021978
Components1

How this topic connects Entity context

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Protection ring

Top relations

related to Further reading · 101
Protection ring → ACM, Age, Alex Ho, Alexander, Andrei, Andrew Warfield, April, Archived, Art, August, Boebert, Boris Dragovic, CA, Caelli, Chapter, Code, Cynthia, David, DBMS, December
related to Implementations · 14
Protection ring → Appending Unit, CPU, For, GE-600, Honeywell, However, Multics, Multiple, Protection, The GE, Unix, Windows, Windows NT, Windows Server

Important terminology Word statistics

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Important terminology

ring operating system hardware mode privilege systems rings level kernel access protection user modes security use levels architecture supervisor x86

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
certain CPU functionalityinstance ofRing 0 is the level with the most privileges and interacts most directly with the physical hardware0.80text
web browsers running in higher numbered rings must request access to the networkinstance ofPrograms0.80text
a resource restricted to a lower numbered ring.X86Sinstance ofPrograms0.80text
a canceled Intel architecture published in 2024instance ofPrograms0.80text
has only ring 0instance ofPrograms0.80text
ring 3instance ofPrograms0.80text
EMM386 run at ring 0instance ofwhereas 386 memory managers0.80text
Intel VT-xinstance ofand hypervisors based on x86 virtualization0.80text
modifying registers for various descriptor tablesinstance ofThis flag determines whether it would be possible to execute machine code operations0.80text
or performing operations such as disabling interruptsinstance ofThis flag determines whether it would be possible to execute machine code operations0.80text
EMM386 is loadedinstance offor as long as no 386 memory manager0.80text
memory regionsinstance ofPrivilege levelA privilege level in the x86 instruction set controls the access of the program currently running on the processor to resources0.80text

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