| 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) and without explicit regard to subsequent accesses to that information. Information flow enforcement mechanisms compare security attributes on all information (data content and data structure), source and destination objects, and respond appropriately (e.g., block, quarantine, alert administrator) when the mechanisms encounter information flows not explicitly allowed by the information flow policy. Metadata is defined as data providing information about one or more other pieces of data such as; purpose of the data, author/creator of the data, network location of where data was created, and application specific data information.
Rationale for non-applicability:
Mobile applications that provide flow control or inter-domain communication are outside the scope of this SRG.
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