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x - Faculty of Computer Science - Technische Universität Dresden

x - Faculty of Computer Science - Technische Universität Dresden

Admission and access

Admission and access control Admission control communicate with authorized partners only user process • • reference monitor check authorization; log author and operation before access to data or programs data, programs Access control subject can only exercise operations on objects if authorized. 119

Computer virus vs. transitive Trojan horse computer virus program 1 transitive Trojan horse program 1 unnecessary write access, e.g. for computer game necessary write access, e.g. for compiler or editor No computer viruses, only transitive Trojan horses! program 2 program 2 Access control Limit spread of attack by as little privileges as possible: Don‘t grant unnecessary access rights! 120

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