DISCUSSION [NIST SP 800-171 R2]
This requirement applies to all system media, digital and non-digital, subject to disposal or reuse. Examples include: digital media found in workstations, network components, scanners, copiers, printers, notebook computers, and mobile devices; and non-digital media such as paper and microfilm. The sanitization process removes information from the media such that the information cannot be retrieved or reconstructed. Sanitization techniques, including clearing, purging, cryptographic erase, and destruction, prevent the disclosure of information to unauthorized individuals when such media is released for reuse or disposal.
Organizations determine the appropriate sanitization methods, recognizing that destruction may be necessary when other methods cannot be applied to the media requiring sanitization.
Organizations use discretion on the employment of sanitization techniques and procedures for media containing information that is in the public domain or publicly releasable or deemed to have no adverse impact on organizations or individuals if released for reuse or disposal. Sanitization of non-digital media includes destruction, removing FCI from documents, or redacting selected sections or words from a document by obscuring the redacted sections or words in a manner equivalent in effectiveness to removing the words or sections from the document. NARA policy and guidance control sanitization processes for federal contract information. NIST SP 800-88 provides guidance on media sanitization.
FURTHER DISCUSSION
“Media” refers to a broad range of items that store information, including paper documents, disks, tapes, digital photography, USB drives, CDs, DVDs, and mobile phones. It is important to know what information is on media so that you can handle it properly. If there is FCI, you or someone in your company should either:
shred or destroy the device before disposal so it cannot be read; or
clean or purge the information, if you want to reuse the device.
See NIST Special Publication 800-88, Revision 1, Guidelines for Media Sanitization, for more information.
Example
As you pack for an office move, you find some old CDs in a file cabinet. You determine that one has information about an old project your company did for the DoD. You shred the CD rather than simply throwing it in the trash [a].
Potential Considerations
Is all managed data storage erased, encrypted, or destroyed using mechanisms to ensure that no usable data is retrievable [a,b]?47
Copyright
Copyright 2020, 2021 Carnegie Mellon University and The Johns Hopkins University Applied Physics Laboratory LLC.
Copyright 2021 Futures, Inc.
This material is based upon work funded and supported by the Department of Defense under Contract No. FA8702-15-D-0002 with Carnegie Mellon University for the operation of the Software Engineering Institute, a federally funded research and development center, and under Contract No. HQ0034-13-D-0003 and Contract No. N00024-13-D-6400 with the Johns Hopkins University Applied Physics Laboratory LLC, a University Affiliated Research Center.
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