Question

What are the Key characteristics that determines if OS code is trusted? ​

Answer 1

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1)Functional correctness - OS code consistent with specs

2)Enforcement of integrity - OS keeps integrity of its data and other resources evenif presented with flawed or unauthorized commands

3)Limited privileges - OS minimizes access to secure data/resources - Trusted pgms must have „need to access” and properaccess rights to use resources protected by OSUntrusted pgms can’t access resources protected by OS

4)Appropriate confidence level- OS code examined and rated at appropriate trust level

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