information flow enforcement
163530·updated Aug 30, 2026A security control category that governs whether and how data may move between subjects, objects, systems, or trust domains — distinct from access control, which concerns *who* may read or write information. Information flow enforcement regulates *where* information is allowed to travel within a system and between systems, as opposed to who is allowed to access the information, and without explicit regard to subsequent accesses to that information. Organizations employ information flow control policies and enforcement mechanisms to control flows between designated sources and destinations; flow control is based on the characteristics of the information and/or the information path, and enforcement occurs in boundary protection devices that use rule sets, packet-filtering on header information, or message-filtering based on content. Enforcement techniques include prohibiting transfers between connected systems, verifying write permissions before accepting information from another security or privacy domain, employing hardware mechanisms to enforce one-way flows, and implementing trustworthy regrading mechanisms to reassign security or privacy attributes and labels.
Source
Enforcementthe sentence this term was read in
generalized from a web lookup of the quoted expression at proposal time Verdict: term of art.
- AC-4 INFORMATION FLOW ENFORCEMENT
- SL5 Standard for AI Security
- AC-4: Information Flow Enforcement - CSF Tools
A definition generalized from search results is a draft to react to, not provenance. Confirm it against an authority document before this term is verified.
A web lookup ran when this term was proposed
A security control mechanism that governs *where* and *between which entities* data may travel within a system or across system boundaries, as distinct from access control, which governs *who* may read or write data. Information flow control regulates where information can travel within a system and between systems — in contrast to who is allowed to access the information — and without regard to subsequent accesses to that information. Organizations commonly employ information flow control policies and enforcement mechanisms to control the flow of information between designated sources and destinations within and between connected systems; flow control is based on the characteristics of the information and/or the information path, and enforcement occurs in boundary protection devices that employ rule sets, packet-filtering based on header information, or message-filtering based on message content. The concept is broader than simple firewalling because it can include data classification and context-aware rules; in a cybersecurity governance context it is discussed alongside confidentiality, segregation of duties, and containment.
Advisory only. A term this product ships is defined by an authority document, not by a search result.
Proposed during multiword review of this document in the CKI mapping queue.
Attested in
Classifications
Entity Type
Sensitivity
Information Class
Variants
- plural
- information flow enforcements
- possessive
- information flow enforcement's
- pluralpossessive
- information flow enforcements'
Framework definitions
- §1 · attested_usage_reviewer_confirmed
- No definition is given in NIST SP 800-171r3. The term is attested in use at 2 citations in that document; a definition is pending curation.Increment 2: attested in 800-171r3 without a glossary definition.
- §1 · web_lookup_draft
- A security control category that governs whether and how data may move between subjects, objects, systems, or trust domains — distinct from access control, which concerns *who* may read or write information. Information flow enforcement regulates *where* information is allowed to travel within a system and between systems, as opposed to who is allowed to access the information, and without explicit regard to subsequent accesses to that information. Organizations employ information flow control policies and enforcement mechanisms to control flows between designated sources and destinations; flow control is based on the characteristics of the information and/or the information path, and enforcement occurs in boundary protection devices that use rule sets, packet-filtering on header information, or message-filtering based on content. Enforcement techniques include prohibiting transfers between connected systems, verifying write permissions before accepting information from another security or privacy domain, employing hardware mechanisms to enforce one-way flows, and implementing trustworthy regrading mechanisms to reassign security or privacy attributes and labels.DR-088 backfill from the noun definition column