id: "AC-04(12)" title: "Data Type Identifiers" family: "AC" family_name: "Access Control" sort_id: "ac-04.12" priority: "P1" implementation_level: "system" parent: "AC-04" enhancement: True
Statement
When transferring information between different security domains, use {{ insert: param, ac-04.12_odp }} to validate data essential for information flow decisions.
Guidance
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.
Assessment Objective
when transferring information between different security domains, {{ insert: param, ac-04.12_odp }} are used to validate data essential for information flow decisions.
Access control policy
information flow control policies
procedures addressing information flow enforcement
system design documentation
system configuration settings and associated documentation
list of data type identifiers
system audit records
system security plan
other relevant documents or records
System/network administrators
organizational personnel with information security responsibilities
system developers
Mechanisms implementing information flow enforcement policy