| Efficiency
2: |
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| � | Most
operations e.g. calculation of |
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| capabilities
are cached |
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| � | Tn is
totally dynamic, so if something changes |
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| the
effect promulgates throughout the system. |
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| This
makes rescinding capabilities easy |
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| � | There
will be some cost, but we think it will |
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| be
unnoticeable on modern computers |
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