Use Of External Information Systems | Network Accessible Storage Devices, v1.0

Defines conformance and assessment criteria for verifying that an organization prohibits the use of organization-defined network accessible storage devices in external information systems.
If an assessment step references organization-defined elements (E.g. <organization-defined personnel or roles>, <organization-defined frequency>, etc.), corresponding citations/excerpts must be provided to confirm that the organization has established and documented these values and that they apply as referenced in the conformance criteria.

Similarly, if a "Selection" among multiple options (e.g. [Selection (one or more): as needed; ]) is specified, evidence must be provided to establish that the option(s) implemented by the organization have been defined and documented.

The assessment step shall not be marked as satisfied without this evidence.

Assessment Step

1
Use Of External Information Systems | Network Accessible Storage Devices (UseOfExternalInformationSystemsNetworkAccessibleStorageDevices)
Does the organization prohibit the use of [Assignment: organization-defined network accessible storage devices] in external information systems?
Artifact
A1
Provide evidence (e.g. organizational policies, procedures, compliance/assessment reports, etc.) that support the assessor's response to this assessment step.
If conformance criteria reference organization-defined elements (e.g. <organization-defined personnel or roles>, <organization-defined frequency>, etc.), these values must be defined and documented by the organization.

Similarly, if the criteria specify a "Selection" among multiple options (e.g. [Selection (one or more): as needed; ]), the option(s) implemented by the organization must also be defined and documented.

Conformance Criteria (1)

C1
The organization prohibits the use of [Assignment: organization-defined network accessible storage devices] in external information systems.
Citation
SP800-53R4
Appendix F, AC-20 (4)