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Module 18: Key Concepts of OS Protection Domains

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C.U

The document discusses different approaches to implementing access control and protection in operating systems, including using access matrices to represent access rights for domains and objects, and capability-based systems where capabilities function like keys to allow access. It also covers revoking access rights, language-based protection where policies are specified in code, and how protection is implemented in Java using protection domains and stack inspection.

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Module 18: Protection ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Protection ,[object Object],[object Object],[object Object]
Domain Structure ,[object Object],[object Object]
Domain Implementation (UNIX) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Domain Implementation (Multics) ,[object Object],[object Object],Multics Rings
Access Matrix ,[object Object],[object Object],[object Object],[object Object]
Access Matrix Figure A
Use of Access Matrix ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Use of Access Matrix (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Implementation of Access Matrix ,[object Object],[object Object],[object Object],[object Object],[object Object]
Access Matrix of Figure A With Domains as Objects Figure B
Access Matrix with Copy Rights
Access Matrix With Owner Rights
Modified Access Matrix of Figure B
Revocation of Access Rights ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Capability-Based Systems ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Language-Based Protection ,[object Object],[object Object],[object Object]
Protection in Java 2 ,[object Object],[object Object],[object Object],[object Object]
Stack Inspection

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Module 18: Key Concepts of OS Protection Domains