{"id":4992,"date":"2020-04-02T08:51:12","date_gmt":"2020-04-02T13:51:12","guid":{"rendered":"https:\/\/ndisac.org\/dibscc\/?p=4992"},"modified":"2025-01-29T12:39:21","modified_gmt":"2025-01-29T17:39:21","slug":"ac-l2-3-1-21","status":"publish","type":"post","link":"https:\/\/ndisac.org\/dibscc\/cyberassist\/cybersecurity-maturity-model-certification\/level-2\/ac-l2-3-1-21\/","title":{"rendered":"AC.L2-3.1.21 Portable Storage Use"},"content":{"rendered":"<p>[et_pb_section fb_built=&#8221;1&#8243; _builder_version=&#8221;3.22&#8243;][et_pb_row _builder_version=&#8221;3.25&#8243; background_size=&#8221;initial&#8221; background_position=&#8221;top_left&#8221; background_repeat=&#8221;repeat&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;3.0.47&#8243; custom_padding=&#8221;|||&#8221; custom_padding__hover=&#8221;|||&#8221;][et_pb_text _builder_version=&#8221;4.9.2&#8243; vertical_offset_tablet=&#8221;0&#8243; horizontal_offset_tablet=&#8221;0&#8243; hover_enabled=&#8221;0&#8243; z_index_tablet=&#8221;0&#8243; text_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; text_text_shadow_vertical_length_tablet=&#8221;0px&#8221; text_text_shadow_blur_strength_tablet=&#8221;1px&#8221; link_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; link_text_shadow_vertical_length_tablet=&#8221;0px&#8221; link_text_shadow_blur_strength_tablet=&#8221;1px&#8221; ul_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; ul_text_shadow_vertical_length_tablet=&#8221;0px&#8221; ul_text_shadow_blur_strength_tablet=&#8221;1px&#8221; ol_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; ol_text_shadow_vertical_length_tablet=&#8221;0px&#8221; ol_text_shadow_blur_strength_tablet=&#8221;1px&#8221; quote_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; quote_text_shadow_vertical_length_tablet=&#8221;0px&#8221; quote_text_shadow_blur_strength_tablet=&#8221;1px&#8221; header_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; header_text_shadow_vertical_length_tablet=&#8221;0px&#8221; header_text_shadow_blur_strength_tablet=&#8221;1px&#8221; header_2_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; header_2_text_shadow_vertical_length_tablet=&#8221;0px&#8221; header_2_text_shadow_blur_strength_tablet=&#8221;1px&#8221; header_3_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; header_3_text_shadow_vertical_length_tablet=&#8221;0px&#8221; header_3_text_shadow_blur_strength_tablet=&#8221;1px&#8221; header_4_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; header_4_text_shadow_vertical_length_tablet=&#8221;0px&#8221; header_4_text_shadow_blur_strength_tablet=&#8221;1px&#8221; header_5_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; header_5_text_shadow_vertical_length_tablet=&#8221;0px&#8221; header_5_text_shadow_blur_strength_tablet=&#8221;1px&#8221; header_6_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; header_6_text_shadow_vertical_length_tablet=&#8221;0px&#8221; header_6_text_shadow_blur_strength_tablet=&#8221;1px&#8221; box_shadow_horizontal_tablet=&#8221;0px&#8221; box_shadow_vertical_tablet=&#8221;0px&#8221; box_shadow_blur_tablet=&#8221;40px&#8221; box_shadow_spread_tablet=&#8221;0px&#8221; sticky_enabled=&#8221;0&#8243;]<\/p>\n<h2>CMMC Requirement AC.L2-3.1.21 &#8211; Portable Storage Use: Limit use of portable storage devices on external systems.<\/h2>\n<p>[\/et_pb_text][et_pb_text _builder_version=&#8221;4.4.3&#8243; vertical_offset_tablet=&#8221;0&#8243; horizontal_offset_tablet=&#8221;0&#8243; custom_margin=&#8221;||||false|false&#8221; custom_padding=&#8221;20px|20px|20px|20px|false|false&#8221; z_index_tablet=&#8221;0&#8243; text_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; text_text_shadow_vertical_length_tablet=&#8221;0px&#8221; text_text_shadow_blur_strength_tablet=&#8221;1px&#8221; link_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; link_text_shadow_vertical_length_tablet=&#8221;0px&#8221; link_text_shadow_blur_strength_tablet=&#8221;1px&#8221; ul_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; ul_text_shadow_vertical_length_tablet=&#8221;0px&#8221; ul_text_shadow_blur_strength_tablet=&#8221;1px&#8221; ol_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; ol_text_shadow_vertical_length_tablet=&#8221;0px&#8221; ol_text_shadow_blur_strength_tablet=&#8221;1px&#8221; quote_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; quote_text_shadow_vertical_length_tablet=&#8221;0px&#8221; quote_text_shadow_blur_strength_tablet=&#8221;1px&#8221; header_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; header_text_shadow_vertical_length_tablet=&#8221;0px&#8221; header_text_shadow_blur_strength_tablet=&#8221;1px&#8221; header_2_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; header_2_text_shadow_vertical_length_tablet=&#8221;0px&#8221; header_2_text_shadow_blur_strength_tablet=&#8221;1px&#8221; header_3_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; header_3_text_shadow_vertical_length_tablet=&#8221;0px&#8221; header_3_text_shadow_blur_strength_tablet=&#8221;1px&#8221; header_4_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; header_4_text_shadow_vertical_length_tablet=&#8221;0px&#8221; header_4_text_shadow_blur_strength_tablet=&#8221;1px&#8221; header_5_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; header_5_text_shadow_vertical_length_tablet=&#8221;0px&#8221; header_5_text_shadow_blur_strength_tablet=&#8221;1px&#8221; header_6_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; header_6_text_shadow_vertical_length_tablet=&#8221;0px&#8221; header_6_text_shadow_blur_strength_tablet=&#8221;1px&#8221; border_width_all=&#8221;1px&#8221; border_color_all=&#8221;#bcbcbc&#8221; box_shadow_style=&#8221;preset1&#8243; box_shadow_horizontal_tablet=&#8221;0px&#8221; box_shadow_vertical_tablet=&#8221;0px&#8221; box_shadow_blur_tablet=&#8221;40px&#8221; box_shadow_spread_tablet=&#8221;0px&#8221;]Links to Publicly Available Resources<\/p>\n<p class=\"p1\"><span class=\"s1\"><!-- Beginning of Link Library Output --><div id='linklist1' class='linklist'><!-- Div Linklist -->\n<div class=\"LinkLibraryCat LinkLibraryCat334 level0\"><!-- Div Category -->\n\t<ul>\n<li><a href=\"https:\/\/dodcio.defense.gov\/Portals\/0\/Documents\/CMMC\/AssessmentGuideL2v2.pdf\" id=\"link-9989\" class=\"track_this_link \" rel=\"noopener noreferrer\" target=\"_blank\">CMMC Level 2 Assessment Guide<\/a>\n<p>This document provides assessment guidance for conducting Cybersecurity Maturity Model Certification (CMMC) assessments for Level 2.<\/p><\/li>\n<li><a href=\"https:\/\/www.tripwire.com\/state-of-security\/report-usb-threats-to-ics-systems-have-nearly-doubled?_gl=1*17h2dr2*_up*MQ..*_ga*NTE0Nzg5ODUwLjE3NTU4OTEzMzQ.*_ga_CM76E0XMNW*czE3NTU4OTEzMzQkbzEkZzEkdDE3NTU4OTE0MDYkajYwJGwwJGgw*_ga_NHMHGJWX49*czE3NTU4OTEzMzMkbzEkZzEkdDE3NTU4OTE0MDYkajYwJGwwJGgw\" id=\"link-2572\" class=\"track_this_link \" rel=\"noopener noreferrer\" target=\"_blank\">Forta &#8211; Report: USB threats to ICS systems have nearly doubled<\/a>\n<p>This article provides an overview of the risks associated with removable media for industrial facilities based on a 2020 Honeywell report.<\/p><\/li>\n<li><a href=\"https:\/\/www.infosecinstitute.com\/resources\/security-awareness\/security-awareness-hazards-removable-media\/\" id=\"link-2547\" class=\"track_this_link \" rel=\"noopener noreferrer\" target=\"_blank\">InfoSec Institute &#8211; The Security Awareness Hazards of Removable Media<\/a>\n<p>This article provides an overview of removable media including the risks associated with this technology and how to implement a control policy.<\/p><\/li>\n<li><a href=\"https:\/\/www.mcafee.com\/en-us\/antivirus\/mcafee-total-protection.html\" id=\"link-3078\" class=\"track_this_link \" rel=\"noopener noreferrer\" target=\"_blank\">McAfee Total Protection<\/a>\n<p>McAfee Total Protection to reduce the attack surface<\/p><\/li>\n<li><a href=\"https:\/\/learn.microsoft.com\/en-us\/entra\/standards\/configure-cmmc-level-2-access-control?utm_source=chatgpt.com\" id=\"link-16967\" class=\"track_this_link \" rel=\"noopener noreferrer\" target=\"_blank\">Microsoft &#8211; Configure CMMC Level 2 Access Control (AC) controls<\/a>\n<p>Offers actionable guidance on how to map Access Control CMMC Requirements to specific configurations in Microsoft Entra ID (Formerly Azure AD).<\/p><\/li>\n<li><a href=\"https:\/\/nvlpubs.nist.gov\/nistpubs\/SpecialPublications\/NIST.SP.1334.ipd.pdf\" id=\"link-17063\" class=\"track_this_link \" rel=\"noopener noreferrer\" target=\"_blank\">NIST SP 1334 &#8211; Reducing the Cybersecurity Risks of Portable Storage Media in OT Environments<\/a>\n<p>The National Cybersecurity Center of Excellence (NCCoE) has developed cybersecurity considerations to help OT personnel use portable storage media securely and effectively.<\/p><\/li>\n<li><a href=\"https:\/\/www.opswat.com\/blog\/removable-media-policy-guidelines-best-practices\" id=\"link-2546\" class=\"track_this_link \" rel=\"noopener noreferrer\" target=\"_blank\">OPSWAT &#8211; Removable Media Policy: Guidelines &amp; Best Practices<\/a>\n<p>Implementing a removable media policy helps organizations control how employees use USB drives, external hard drives, and other\u00a0portable storage devices. The main purpose is to prevent data breaches and malware infections while keeping sensitive company information secure. These policies set clear rules about what's allowed and what isn't, helping businesses stay compliant with important security standards like ISO 27001, NIST, and Department of Defense requirements.<\/p><\/li>\n<li><a href=\"https:\/\/docs.redhat.com\/en\/documentation\/red_hat_enterprise_linux\/7\/html\/security_guide\/sec-using-usbguard\" id=\"link-3076\" class=\"track_this_link \" rel=\"noopener noreferrer\" target=\"_blank\">RedHat &#8211; Using USBGuard<\/a>\n<p>The USBGuard software framework provides system protection against intrusive USB devices by implementing basic whitelisting and blacklisting capabilities based on device attributes.<\/p><\/li>\n<li><a href=\"https:\/\/assets.contentstack.io\/v3\/assets\/blt36c2e63521272fdc\/bltea59236f183ab31b\/5e9e06135352ae292603886c\/removable_media_policy.pdf\" id=\"link-3072\" class=\"track_this_link \" rel=\"noopener noreferrer\" target=\"_blank\">SANS &#8211; Removable Media Policy<\/a>\n<p>This sample policy provided by SANS discusses removable media.<\/p><\/li>\n<li><a href=\"https:\/\/www.cisa.gov\/sites\/default\/files\/publications\/RisksOfPortableDevices.pdf\" id=\"link-3080\" class=\"track_this_link \" rel=\"noopener noreferrer\" target=\"_blank\">US-CERT &#8211; The Risk of Using Portable Devices<\/a>\n<p>This paper focuses on the risks associated with simple media devices and smart media devices.<\/p><\/li>\n<li><a href=\"https:\/\/www.youtube.com\/watch?v=dvuqnj2_BPk\" id=\"link-12495\" class=\"track_this_link \" rel=\"noopener noreferrer\" target=\"_blank\">YouTube &#8211; NIST SP 800-171 Control 3.1.21 &#8212; Limit use of portable storage devices on external systems<\/a>\n<p>In this edition of the On Call Compliance Solutions Compliance Tip of the Week, we discuss placing limits on the use of organization-controlled portable storage devices in external systems including a complete prohibition of the use of such devices or restrictions on how the devices may be used and under what conditions the devices may be used. Let\u2019s talk about NIST 800-171 Control 3.1.21 -- Limit use of portable storage devices on external systems.<\/p><\/li>\n\t<\/ul>\n<\/div><!-- Div End Category -->\n<script type='text\/javascript'>\njQuery(document).ready(function()\n{\njQuery('.arrow-up').hide();\njQuery('#linklist1 a.track_this_link').click(function() {\nlinkid = this.id;\nlinkid = linkid.substring(5);\npath = '';\njQuery.ajax( {    type: 'POST',    url: 'https:\/\/ndisac.org\/dibscc\/wp-admin\/admin-ajax.php',     data: { action: 'link_library_tracker',             _ajax_nonce: '89940d9abd',             id:linkid, xpath:path }     });\nreturn true;\n});\njQuery('#linklist1 .expandlinks').click(function() {\ntarget = '.' + jQuery(this).attr('id');\nsubcattarget = '.' + jQuery(this).attr('data-subcat');\nif ( jQuery( target ).is(':visible') ) {\njQuery(target).slideUp();\njQuery(subcattarget).slideToggle();\njQuery(this).children('img').attr('src', 'https:\/\/ndisac.org\/dibscc\/wp-content\/plugins\/link-library\/icons\/expand-32.png');\n} else {\njQuery(target).slideDown();\njQuery(subcattarget).slideToggle();\njQuery(this).children('img').attr('src', 'https:\/\/ndisac.org\/dibscc\/wp-content\/plugins\/link-library\/icons\/collapse-32.png');\n}\n});\njQuery('#linklist1 .linklistcatclass').click(function() {\njQuery(this).siblings('.expandlinks').click();\n});\njQuery('#linklist1 .linklistcatnamedesc').click(function() {\njQuery(this).siblings('.expandlinks').click();\n});\n});\n<\/script>\n<\/div><!-- Div Linklist -->\n<!-- End of Link Library Output -->\n\n<\/span><\/p>\n<p>[\/et_pb_text][et_pb_divider _builder_version=&#8221;4.2.2&#8243; vertical_offset_tablet=&#8221;0&#8243; horizontal_offset_tablet=&#8221;0&#8243; z_index_tablet=&#8221;0&#8243; box_shadow_horizontal_tablet=&#8221;0px&#8221; box_shadow_vertical_tablet=&#8221;0px&#8221; box_shadow_blur_tablet=&#8221;40px&#8221; box_shadow_spread_tablet=&#8221;0px&#8221;][\/et_pb_divider][et_pb_testimonial quote_icon=&#8221;off&#8221; _builder_version=&#8221;4.9.2&#8243; vertical_offset_tablet=&#8221;0&#8243; horizontal_offset_tablet=&#8221;0&#8243; hover_enabled=&#8221;0&#8243; z_index_tablet=&#8221;0&#8243; author_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; author_text_shadow_vertical_length_tablet=&#8221;0px&#8221; author_text_shadow_blur_strength_tablet=&#8221;1px&#8221; position_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; position_text_shadow_vertical_length_tablet=&#8221;0px&#8221; position_text_shadow_blur_strength_tablet=&#8221;1px&#8221; company_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; company_text_shadow_vertical_length_tablet=&#8221;0px&#8221; company_text_shadow_blur_strength_tablet=&#8221;1px&#8221; body_link_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; body_link_text_shadow_vertical_length_tablet=&#8221;0px&#8221; body_link_text_shadow_blur_strength_tablet=&#8221;1px&#8221; body_ul_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; body_ul_text_shadow_vertical_length_tablet=&#8221;0px&#8221; body_ul_text_shadow_blur_strength_tablet=&#8221;1px&#8221; body_ol_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; body_ol_text_shadow_vertical_length_tablet=&#8221;0px&#8221; body_ol_text_shadow_blur_strength_tablet=&#8221;1px&#8221; body_quote_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; body_quote_text_shadow_vertical_length_tablet=&#8221;0px&#8221; body_quote_text_shadow_blur_strength_tablet=&#8221;1px&#8221; box_shadow_horizontal_tablet=&#8221;0px&#8221; box_shadow_vertical_tablet=&#8221;0px&#8221; box_shadow_blur_tablet=&#8221;40px&#8221; box_shadow_spread_tablet=&#8221;0px&#8221; box_shadow_horizontal_image_tablet=&#8221;0px&#8221; box_shadow_vertical_image_tablet=&#8221;0px&#8221; box_shadow_blur_image_tablet=&#8221;40px&#8221; box_shadow_spread_image_tablet=&#8221;0px&#8221; text_shadow_horizontal_length_tablet=&#8221;0px&#8221; text_shadow_vertical_length_tablet=&#8221;0px&#8221; text_shadow_blur_strength_tablet=&#8221;1px&#8221; sticky_enabled=&#8221;0&#8243;]Discussion [NIST SP 800-171 R2]<br \/>\nLimits on the use of organization-controlled portable storage devices in external systems include complete prohibition of the use of such devices or restrictions on how the devices may be used and under what conditions the devices may be used. Note that while \u201cexternal\u201d typically refers to outside of the organization\u2019s direct supervision and authority that is not always the case. Regarding the protection of CUI across an organization, the organization may have systems that process CUI and others that do not. Among the systems that process CUI there are likely access restrictions for CUI that apply between systems. Therefore, from the perspective of a given system, other systems within the organization may be considered \u201cexternal&#8221; to that system.<\/p>\n<p>Further Discussion<br \/>\nA portable storage device is a system component that can be inserted or attached and easily removed from a system. It is used to store data or information. Examples of portable storage devices include:<\/p>\n<ul>\n<li>compact\/digital video disks (CDs\/DVDs);<\/li>\n<li>Universal Serial Bus (USB) drives;<\/li>\n<li>external hard disk drives;<\/li>\n<li>flash memory cards\/drives; and<\/li>\n<li>floppy disks.<\/li>\n<\/ul>\n<p>This requirement can be implemented in two ways:<\/p>\n<ul>\n<li>identifying the portable storage device usage restrictions, identifying portable storage devices that may be used on external systems, identifying associated external systems on which a portable storage device may be used, and administratively (through the use of a written policy) limiting the usage of the devices to those systems; or<\/li>\n<li>configuring devices to work only when connected to a system to which the portable storage device can authenticate, limiting the devices\u2019 use on external systems to those that the OSA has the ability to manage.<\/li>\n<\/ul>\n<p>[\/et_pb_testimonial][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>[et_pb_section fb_built=&#8221;1&#8243; _builder_version=&#8221;3.22&#8243;][et_pb_row _builder_version=&#8221;3.25&#8243; background_size=&#8221;initial&#8221; background_position=&#8221;top_left&#8221; background_repeat=&#8221;repeat&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;3.0.47&#8243; custom_padding=&#8221;|||&#8221; custom_padding__hover=&#8221;|||&#8221;][et_pb_text _builder_version=&#8221;4.9.2&#8243; vertical_offset_tablet=&#8221;0&#8243; horizontal_offset_tablet=&#8221;0&#8243; hover_enabled=&#8221;0&#8243; z_index_tablet=&#8221;0&#8243; text_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; text_text_shadow_vertical_length_tablet=&#8221;0px&#8221; text_text_shadow_blur_strength_tablet=&#8221;1px&#8221; link_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; 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header_6_text_shadow_horizontal_length=\"header_6_text_shadow_style,%91object Object%93\" header_6_text_shadow_horizontal_length_tablet=\"0px\" header_6_text_shadow_vertical_length=\"header_6_text_shadow_style,%91object Object%93\" header_6_text_shadow_vertical_length_tablet=\"0px\" header_6_text_shadow_blur_strength=\"header_6_text_shadow_style,%91object Object%93\" header_6_text_shadow_blur_strength_tablet=\"1px\" box_shadow_horizontal_tablet=\"0px\" box_shadow_vertical_tablet=\"0px\" box_shadow_blur_tablet=\"40px\" box_shadow_spread_tablet=\"0px\" vertical_offset_tablet=\"0\" horizontal_offset_tablet=\"0\" z_index_tablet=\"0\"]\r\n\r\nAC.2.005: Provide privacy and security notices consistent with applicable CUI rules.\r\n\r\n[\/et_pb_text][et_pb_text _builder_version=\"4.2.2\" text_text_shadow_horizontal_length=\"text_text_shadow_style,%91object Object%93\" text_text_shadow_horizontal_length_tablet=\"0px\" text_text_shadow_vertical_length=\"text_text_shadow_style,%91object 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Object%93\" ol_text_shadow_horizontal_length_tablet=\"0px\" ol_text_shadow_vertical_length=\"ol_text_shadow_style,%91object Object%93\" ol_text_shadow_vertical_length_tablet=\"0px\" ol_text_shadow_blur_strength=\"ol_text_shadow_style,%91object Object%93\" ol_text_shadow_blur_strength_tablet=\"1px\" quote_text_shadow_horizontal_length=\"quote_text_shadow_style,%91object Object%93\" quote_text_shadow_horizontal_length_tablet=\"0px\" quote_text_shadow_vertical_length=\"quote_text_shadow_style,%91object Object%93\" quote_text_shadow_vertical_length_tablet=\"0px\" quote_text_shadow_blur_strength=\"quote_text_shadow_style,%91object Object%93\" quote_text_shadow_blur_strength_tablet=\"1px\" header_text_shadow_horizontal_length=\"header_text_shadow_style,%91object Object%93\" header_text_shadow_horizontal_length_tablet=\"0px\" header_text_shadow_vertical_length=\"header_text_shadow_style,%91object Object%93\" header_text_shadow_vertical_length_tablet=\"0px\" header_text_shadow_blur_strength=\"header_text_shadow_style,%91object Object%93\" header_text_shadow_blur_strength_tablet=\"1px\" header_2_text_shadow_horizontal_length=\"header_2_text_shadow_style,%91object Object%93\" header_2_text_shadow_horizontal_length_tablet=\"0px\" header_2_text_shadow_vertical_length=\"header_2_text_shadow_style,%91object Object%93\" header_2_text_shadow_vertical_length_tablet=\"0px\" header_2_text_shadow_blur_strength=\"header_2_text_shadow_style,%91object Object%93\" header_2_text_shadow_blur_strength_tablet=\"1px\" header_3_text_shadow_horizontal_length=\"header_3_text_shadow_style,%91object Object%93\" header_3_text_shadow_horizontal_length_tablet=\"0px\" header_3_text_shadow_vertical_length=\"header_3_text_shadow_style,%91object Object%93\" header_3_text_shadow_vertical_length_tablet=\"0px\" header_3_text_shadow_blur_strength=\"header_3_text_shadow_style,%91object Object%93\" header_3_text_shadow_blur_strength_tablet=\"1px\" header_4_text_shadow_horizontal_length=\"header_4_text_shadow_style,%91object Object%93\" header_4_text_shadow_horizontal_length_tablet=\"0px\" header_4_text_shadow_vertical_length=\"header_4_text_shadow_style,%91object Object%93\" header_4_text_shadow_vertical_length_tablet=\"0px\" header_4_text_shadow_blur_strength=\"header_4_text_shadow_style,%91object Object%93\" header_4_text_shadow_blur_strength_tablet=\"1px\" header_5_text_shadow_horizontal_length=\"header_5_text_shadow_style,%91object Object%93\" header_5_text_shadow_horizontal_length_tablet=\"0px\" header_5_text_shadow_vertical_length=\"header_5_text_shadow_style,%91object Object%93\" header_5_text_shadow_vertical_length_tablet=\"0px\" header_5_text_shadow_blur_strength=\"header_5_text_shadow_style,%91object Object%93\" header_5_text_shadow_blur_strength_tablet=\"1px\" header_6_text_shadow_horizontal_length=\"header_6_text_shadow_style,%91object Object%93\" header_6_text_shadow_horizontal_length_tablet=\"0px\" header_6_text_shadow_vertical_length=\"header_6_text_shadow_style,%91object Object%93\" header_6_text_shadow_vertical_length_tablet=\"0px\" header_6_text_shadow_blur_strength=\"header_6_text_shadow_style,%91object Object%93\" header_6_text_shadow_blur_strength_tablet=\"1px\" box_shadow_horizontal_tablet=\"0px\" box_shadow_vertical_tablet=\"0px\" box_shadow_blur_tablet=\"40px\" box_shadow_spread_tablet=\"0px\" vertical_offset_tablet=\"0\" horizontal_offset_tablet=\"0\" z_index_tablet=\"0\"]\r\n\r\n<a href=\"https:\/\/ndisac.org\/dibscc\/links\/cloudfaq19\/microsoft-azure-security-fundamentals\/\">Microsoft \u2013 Azure Security Fundamentals<\/a><a href=\"https:\/\/ndisac.org\/dibscc\/links\/regulations\/uk-ministry-of-defences-mod-defcon-658-cyber\/\">UK Ministry of Defence\u2019s (MOD) DEFCON 658 (Cyber)<\/a><a href=\"https:\/\/ndisac.org\/dibscc\/links\/ir-exercises-implementation\/mitre-cyber-exercise-playbook\/\">MITRE \u2013 Cyber Exercise Playbook<\/a>\r\n\r\n[\/et_pb_text][et_pb_divider _builder_version=\"4.2.2\" box_shadow_horizontal_tablet=\"0px\" box_shadow_vertical_tablet=\"0px\" box_shadow_blur_tablet=\"40px\" box_shadow_spread_tablet=\"0px\" vertical_offset_tablet=\"0\" horizontal_offset_tablet=\"0\" z_index_tablet=\"0\" \/][et_pb_testimonial _builder_version=\"4.2.2\" quote_icon_background_color=\"#f5f5f5\" box_shadow_horizontal_image_tablet=\"0px\" box_shadow_vertical_image_tablet=\"0px\" box_shadow_blur_image_tablet=\"40px\" box_shadow_spread_image_tablet=\"0px\" text_shadow_horizontal_length=\"text_shadow_style,%91object Object%93\" text_shadow_horizontal_length_tablet=\"0px\" text_shadow_vertical_length=\"text_shadow_style,%91object Object%93\" text_shadow_vertical_length_tablet=\"0px\" text_shadow_blur_strength=\"text_shadow_style,%91object Object%93\" text_shadow_blur_strength_tablet=\"1px\" body_link_text_shadow_horizontal_length=\"body_link_text_shadow_style,%91object Object%93\" 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box_shadow_spread_tablet=\"0px\" vertical_offset_tablet=\"0\" horizontal_offset_tablet=\"0\" z_index_tablet=\"0\" quote_icon=\"off\"]\r\n\r\nCMMC CLARIFICATION\r\nEvery   system   has   legal   information   about   user   privacy   and   security. A system-use notification banner displays the legal requirements of using the systems.  Users are required to click to agree to the displayed requirements of using the system each time they logon to the machine.  You can use this implicit agreement in the civil and\/or criminal prosecution of an attacker that violates the terms.\r\nDiscuss  legal  notification  requirements  with  your  organization\u2019s  legal  counsel.    This  will  ensure that they meet all applicable requirements.  You should inform the user that:\r\n\u2022 you may monitor, record, and subject to audit any information system usage;\r\n\u2022 you prohibit unauthorized use of the information system;\r\n\u2022 you may subject unauthorized use to criminal and civil penalties; and\r\n\u2022 use of the information system indicates consent to monitoring and recording.\r\n\r\n[\/et_pb_testimonial][\/et_pb_column][\/et_pb_row][\/et_pb_section]","_et_gb_content_width":"","footnotes":""},"categories":[330],"tags":[],"class_list":["post-4992","post","type-post","status-publish","format-standard","hentry","category-level-2"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>AC.L2-3.1.21 Portable Storage Use - DIB SCC CyberAssist<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/ndisac.org\/dibscc\/cyberassist\/cybersecurity-maturity-model-certification\/level-2\/ac-l2-3-1-21\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"AC.L2-3.1.21 Portable Storage Use - DIB SCC CyberAssist\" \/>\n<meta property=\"og:description\" content=\"[et_pb_section fb_built=&#8221;1&#8243; 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