flow control restrictions include
163533·updated Aug 30, 2026The specific policy-derived constraints — such as blocking spoofed traffic, preventing unencrypted transmission of export-controlled data, or limiting cross-organizational data transfers by content type — that an organization imposes under an information flow control regime. They are distinguished from access control (which governs *who* may reach information) by governing instead *where* information may travel within or between systems, irrespective of who subsequently accesses it. In practice, security architects and compliance teams invoke the concept when specifying, auditing, or implementing the enforceable rules that make an information flow control policy (e.g., NIST AC-4) operational.
Source
can transit 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. Flow control restrictions include keepingthe sentence this term was read in
generalized from a web lookup of the quoted expression at proposal time Verdict: compositional.
- AC-4: Information Flow Enforcement - CSF Tools
- AC-4 - NIST 800-53 r5 Control Explorer - GRC Academy
- 3.1.3: Control the flow of CUI in accordance with approved authorizations - CSF Tools
- SL5 Standard for AI Security
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
The set of policy-derived rules and enforcement mechanisms that constrain how information may move across paths, boundaries, or domains within and between systems — distinguished from access control in that they govern *where* data may travel rather than *who* may read it, and operate independently of what a recipient subsequently does with the information. 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. In practice the restrictions are implemented at boundary-enforcement points (firewalls, guards, proxies, routers) through rule sets keyed to the characteristics of the information or the information path; 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 or configuration settings that restrict system services, provide packet-filtering based on header information, or message-filtering based on message content. Concrete instances span a wide range: they include blocking external traffic that claim
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
- flow control restrictions includes
- possessive
- flow control restrictions include's
- pluralpossessive
- flow control restrictions includes'
Framework definitions
- §1 · attested_usage_reviewer_confirmed
- No definition is given in NIST SP 800-171r3. The term is attested in use at 1 citation in that document; a definition is pending curation.Increment 2: attested in 800-171r3 without a glossary definition.
- §1 · web_lookup_draft
- The specific policy-derived constraints — such as blocking spoofed traffic, preventing unencrypted transmission of export-controlled data, or limiting cross-organizational data transfers by content type — that an organization imposes under an information flow control regime. They are distinguished from access control (which governs *who* may reach information) by governing instead *where* information may travel within or between systems, irrespective of who subsequently accesses it. In practice, security architects and compliance teams invoke the concept when specifying, auditing, or implementing the enforceable rules that make an information flow control policy (e.g., NIST AC-4) operational.DR-088 backfill from the noun definition column