| Information flow control regulates where information is allowed to travel within an information system and between information systems (as opposed to who is allowed to access the information), without explicit regard to subsequent access to that information.
Transferring information between interconnected information systems of differing security policies introduces risk that such transfers violate one or more policies. While security policy violations may not be absolutely prohibited, policy guidance from information owners/stewards is implemented at the policy enforcement point between the interconnected systems. Specific architectural solutions are mandated, when required, to reduce the potential for undiscovered vulnerabilities.
Architectural solutions include: (i) prohibiting information transfers between interconnected systems (i.e., implementing access only, one way transfer mechanisms); (ii) employing hardware mechanisms to enforce unitary information flow directions; and (iii) implementing fully tested, re-grading mechanisms to reassign security attributes and associated security labels.
This is an information flow requirement. Information flow control applies to applications like a CDS. An AS is not a CDS. |
