id: "SA-08(11)" title: "Inverse Modification Threshold" family: "SA" family_name: "System and Services Acquisition" sort_id: "sa-08.11" priority: "P1" implementation_level: "system" parent: "SA-08" enhancement: True
Statement
Implement the security design principle of inverse modification threshold in {{ insert: param, sa-08.11_odp }}.
Guidance
The principle of inverse modification threshold builds on the principle of trusted components and the principle of hierarchical trust and states that the degree of protection provided to a component is commensurate with its trustworthiness. As the trust placed in a component increases, the protection against unauthorized modification of the component also increases to the same degree. Protection from unauthorized modification can come in the form of the component’s own self-protection and innate trustworthiness, or it can come from the protections afforded to the component from other elements or attributes of the security architecture (to include protections in the environment of operation).
Assessment Objective
{{ insert: param, sa-08.11_odp }} implement the security design principle of inverse modification threshold.
System and services acquisition policy
procedures addressing the security design principle of inverse modification threshold used in the specification, design, development, implementation, and modification of the system
system design documentation
security and privacy requirements and specifications for the system
system security and privacy architecture
system security plan
other relevant documents or records
Organizational personnel with the responsibility for determining system security and privacy requirements
organizational personnel with system specification, design, development, implementation, and modification responsibilities
system developers
organizational personnel with information security responsibilities
Organizational processes for applying the security design principle of inverse modification threshold in system specification, design, development, implementation, and modification
mechanisms supporting the application of the security design principle of inverse modification threshold in system specification, design, development, implementation, and modification