SC-37: Out-of-band Channels

CSF v1.1 References:

PF v1.0 References:


  • Low


  • Moderate


  • High


  • Privacy


Previous Version:

Control Statement

Employ the following out-of-band channels for the physical delivery or electronic transmission of [Assignment: organization-defined information, system components, or devices] to [Assignment: organization-defined individuals or systems]: [Assignment: organization-defined out-of-band channels].

Supplemental Guidance

Out-of-band channels include local, non-network accesses to systems; network paths physically separate from network paths used for operational traffic; or non-electronic paths, such as the U.S. Postal Service. The use of out-of-band channels is contrasted with the use of in-band channels (i.e., the same channels) that carry routine operational traffic. Out-of-band channels do not have the same vulnerability or exposure as in-band channels. Therefore, the confidentiality, integrity, or availability compromises of in-band channels will not compromise or adversely affect the out-of-band channels. Organizations may employ out-of-band channels in the delivery or transmission of organizational items, including authenticators and credentials; cryptographic key management information; system and data backups; configuration management changes for hardware, firmware, or software; security updates; maintenance information; and malicious code protection updates.

Control Enhancements

SC-37(1): Ensure Delivery and Transmission


(Not part of any baseline)

Employ [Assignment: organization-defined controls] to ensure that only [Assignment: organization-defined individuals or systems] receive the following information, system components, or devices: [Assignment: organization-defined information, system components, or devices].