Comparison of Privilege Authorization Features

Comparison Of Privilege Authorization Features

A number of computer operating systems employ security features to help prevent malicious software from gaining sufficient privileges to compromise the computer system. Operating systems lacking such features, such as DOS, Windows implementations prior to Windows NT (and its descendants), CP/M-80, and all Mac operating systems prior to Mac OS X, had only one category of user who was allowed to do anything. With separate execution contexts it is possible for multiple users to store private files, for multiple users to use a computer at the same time, to protect the system against malicious users, and to protect the system against malicious programs. The first multi-user secure system was Multics, which began development in the 1960s; it wasn't until UNIX, BSD, Linux, and NT in the late 80s and early 90s that multi-tasking security contexts were brought to x86, consumer machines.

Read more about Comparison Of Privilege Authorization Features:  Introduction To Implementations, Identifying When Administrative Rights Are Needed

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Comparison Of Privilege Authorization Features - Identifying When Administrative Rights Are Needed
... In order for an operating system to know when to prompt the user for authorization, an application or action needs to identify itself as requiring elevated privileges ... moment that an operation requiring such privileges is executed, it is often not ideal to ask for privileges partway through completing a task ... the work done before requiring administrator privileges would have to be undone because the task could not be seen though to the end ...

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