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Biba Model





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This security model is directed toward .

With Biba, users can only create content at or below their own security level (a monk may write a prayer book that can be read by commoners, but a high priest would not be allowed to view the work of the (presumably) less pious monk). Conversely, users can only '''view content at or above''' their own security level (a monk may read a book written by the high priest, but may not read a pamphlet written by a lowly commoner).

;;;
  • (star) property.

  • In this case they are sort of reversed to Bell-La Padula:


# The Simple Security Property states that a subject at a given level of integrity may not read an object at a lower integrity level (no read-down).
  • (star) Security Property states that a subject at a given level of integrity must not write to any object at a higher level of integrity (no write-up).



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