AC-19(4)

AC-19(4): Restrictions for Classified Information

The organization:

(a): Prohibits the use of unclassified mobile devices in facilities containing information systems processing, storing, or transmitting classified information unless specifically permitted by the authorizing official; and

(b): Enforces the following restrictions on individuals permitted by the authorizing official to use unclassified mobile devices in facilities containing information systems processing, storing, or transmitting classified information:
- (1): Connection of unclassified mobile devices to classified information systems is prohibited;
- (2): Connection of unclassified mobile devices to unclassified information systems requires approval from the authorizing official;
- (3): Use of internal or external modems or wireless interfaces within the unclassified mobile devices is prohibited; and
- (4): Unclassified mobile devices and the information stored on those devices are subject to random reviews and inspections by [organization-defined security officials], and if classified information is found, the incident handling policy is followed.

(c): Restricts the connection of classified mobile devices to classified information systems in accordance with [organization-defined security policies].

Overlays
None

CSF Categories
None

The controls below (if any) were marked by NIST as being related to AC-19(4).

Control	Description
CA-6	The organization: a: Assigns a senior-level executive or manager as the authorizing official for the information system; b: Ensures that the authorizing official authorizes the information system for processing before commencing operations; and c: Updates the security authorization [organization-defined frequency].
IR-4	The organization: a: Implements an incident handling capability for security incidents that includes preparation, detection and analysis, containment, eradication, and recovery; b: Coordinates incident handling activities with contingency planning activities; and c: Incorporates lessons learned from ongoing incident handling activities into incident response procedures, training, and testing, and implements the resulting changes accordingly.

Control

Description

a: Assigns a senior-level executive or manager as the authorizing official for the information system;

b: Ensures that the authorizing official authorizes the information system for processing before commencing operations; and

a: Implements an incident handling capability for security incidents that includes preparation, detection and analysis, containment, eradication, and recovery;

b: Coordinates incident handling activities with contingency planning activities; and

c: Incorporates lessons learned from ongoing incident handling activities into incident response procedures, training, and testing, and implements the resulting changes accordingly.

The controls below (if any) add on to the requirements of AC-19(4).

Control	Description
No controls

The CCIs below are tied to AC-19(4).

CCI	Definition
CCI-001330	Prohibit the use of unclassified mobile devices in facilities containing systems processing, storing, or transmitting classified information unless specifically permitted by the authorizing official.
CCI-001331	Prohibit the connection of unclassified mobile devices to classified systems.
CCI-001332	Connection of unclassified mobile devices to unclassified systems requires approval from the authorizing official.
CCI-001333	Use of internal or external modems or wireless interfaces within the unclassified mobile devices is prohibited.
CCI-001334	Require unclassified mobile devices used in facilities containing systems processing, storing, or transmitting classified information and the information stored on those devices be subject to random reviews and inspections by organization-defined security officials.
CCI-001335	Defines security officials to perform reviews and inspections of unclassified mobile devices in facilities containing systems processing, storing, or transmitting classified information.
CCI-001458	If classified information is found on mobile devices, the incident handling policy is to be followed.
CCI-002327	Defines the security policies which restrict the connection of classified mobile devices to classified systems.
CCI-002328	Restrict the connection of classified mobile devices to classified systems in accordance with organization-defined security policies.