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Which security model is based on complete separation between security levels, thus minimizing leakages through covert channels?
Noninterference
State machine
Information flow
Matrix-based
The noninterference model ensures that actions that take place at a higher security level do not affect actions that take place at a lower level. The goal of a noninterference model is to strictly separate differing security levels to assure that higher-level actions do not determine what lower-level users can see. This is in contrast to other security models that control information flows between differing levels of users, By maintaining strict separation of security levels, a noninterference model minimizes leakages that might happen through a covert channel.
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