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AC-04(12) Data Type Identifiers

NIST SP 800-53 (controls) 5.2.0 against 5.1.1+u4
All changes in this version
unchanged AC part of AC-4

Title

Data Type Identifiers

Control

When transferring information between different security domains, use [Assignment: data type identifiers] to validate data essential for information flow decisions.

Discussion

Data type identifiers include filenames, file types, file signatures or tokens, and multiple internal file signatures or tokens. Systems only allow transfer of data that is compliant with data type format specifications. Identification and validation of data types is based on defined specifications associated with each allowed data format. The filename and number alone are not used for data type identification. Content is validated syntactically and semantically against its specification to ensure that it is the proper data type.

Parameters

ac-04.12_odp: data type identifiers

Assessment objective

AC-04(12) when transferring information between different security domains, [Assignment: data type identifiers] are used to validate data essential for information flow decisions.

STIG rules that implement this control 0

No followed STIG rule cites a CCI indexed to this control (CCI list 2026-07-14).