{"id":15412,"date":"2025-01-30T09:08:12","date_gmt":"2025-01-30T14:08:12","guid":{"rendered":"https:\/\/ndisac.org\/dibscc\/?p=15412"},"modified":"2025-03-31T07:21:19","modified_gmt":"2025-03-31T12:21:19","slug":"ia-l3-3-5-1e","status":"publish","type":"post","link":"https:\/\/ndisac.org\/dibscc\/cyberassist\/cybersecurity-maturity-model-certification\/level-3\/ia-l3-3-5-1e\/","title":{"rendered":"IA.L3-3.5.1E Bidirectional Authentication"},"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; 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; 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box_shadow_blur_tablet=&#8221;40px&#8221; box_shadow_spread_tablet=&#8221;0px&#8221;]<\/p>\n<h2>CMMC Requirement IA.L3-3.5.1E \u2013 Bidirectional Authentication: Identify and authenticate systems and system components, where possible, before establishing a network connection using bidirectional authentication that is cryptographically based and replay resistant.<\/h2>\n<p>[\/et_pb_text][et_pb_text _builder_version=&#8221;4.9.2&#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; 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; 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; sticky_enabled=&#8221;0&#8243;]<\/p>\n<p>\nLinks 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 LinkLibraryCat647 level0\"><!-- Div Category -->\n\t<ul>\n<li><a href=\"https:\/\/builtin.com\/software-engineering-perspectives\/mutual-tls-tutorial#:~:text=Mutual%20transport%20layer%20security%20(mTLS)%20or%20two%2Dway%20secure,have%20the%20correct%20private%20key.\" id=\"link-16506\" class=\"track_this_link \" rel=\"noopener noreferrer\" target=\"_blank\">Built In &#8211; Mutual TLS: A Tutorial<\/a>\n<p>This web page provides an overview of TLS and Mutual transport layer security (mTLS) and how it is used to provide is an end-to-end security for mutual authentication.<\/p><\/li>\n<li><a href=\"https:\/\/dodcio.defense.gov\/Portals\/0\/Documents\/CMMC\/AssessmentGuideL3v2.pdf\" id=\"link-14791\" class=\"track_this_link \" rel=\"noopener noreferrer\" target=\"_blank\">CMMC Level 3 Assessment Guide<\/a>\n<p>This document provides assessment guidance for conducting Cybersecurity Maturity Model Certification (CMMC) assessments for Level 3.<\/p><\/li>\n<li><a href=\"https:\/\/1.ieee802.org\/security\/802-1x\/\" id=\"link-16507\" class=\"track_this_link \" rel=\"noopener noreferrer\" target=\"_blank\">IEEE &#8211; 802.1X: Port-Based Network Access Control<\/a>\n<\/li>\n<li><a href=\"https:\/\/learn.microsoft.com\/en-us\/windows-server\/security\/kerberos\/kerberos-authentication-overview\" id=\"link-16508\" class=\"track_this_link \" rel=\"noopener noreferrer\" target=\"_blank\">Microsoft &#8211; Kerberos Authentication Overview<\/a>\n<p>This web page contains information about Kerberos, an authentication protocol that is used to verify the identity of a user or host.<\/p><\/li>\n<li><a href=\"https:\/\/learn.microsoft.com\/en-us\/azure\/confidential-computing\/trusted-execution-environment\" id=\"link-16505\" class=\"track_this_link \" rel=\"noopener noreferrer\" target=\"_blank\">Microsoft &#8211; Trusted Execution Environment (TEE)<\/a>\n<p>Microsoft support document providing overview and guidance for Trusted Execution Environment (TEE).<\/p><\/li>\n<li><a href=\"https:\/\/learn.microsoft.com\/en-us\/windows\/security\/hardware-security\/tpm\/trusted-platform-module-overview\" id=\"link-8011\" class=\"track_this_link \" rel=\"noopener noreferrer\" target=\"_blank\">Microsoft &#8211; Trusted Platform Module (TPM) Technology Overview<\/a>\n<p>Microsoft support document providing overview and guidance for Trusted Platform Modules and how it is used for access control and authentication.<\/p><\/li>\n<li><a href=\"https:\/\/nvlpubs.nist.gov\/nistpubs\/SpecialPublications\/NIST.SP.800-63-4.pdf\" id=\"link-2536\" class=\"track_this_link \" rel=\"noopener noreferrer\" target=\"_blank\">NIST SP 800-63: Digital Identity Guidelines<\/a>\n<p>This NIST Special Publication covers identity proofing and authentication of users interacting with government IT systems over open networks.<\/p><\/li>\n<li><a href=\"https:\/\/nvlpubs.nist.gov\/nistpubs\/SpecialPublications\/NIST.SP.800-77r1.pdf\" id=\"link-2648\" class=\"track_this_link \" rel=\"noopener noreferrer\" target=\"_blank\">NIST SP 800-77 Rev 1: Guide to IPSec VPNs<\/a>\n<p>This NIST Special Publication offers recommendations for designing, configuring, and managing IPSec VPN solutions.<\/p><\/li>\n<li><a href=\"https:\/\/nvlpubs.nist.gov\/nistpubs\/Legacy\/SP\/nistspecialpublication800-97.pdf\" id=\"link-2621\" class=\"track_this_link \" rel=\"noopener noreferrer\" target=\"_blank\">NIST SP 800-97: Establishing Wireless Robust Security Networks: A Guide to IEEE 802.11i<\/a>\n<p>This NIST Special Publication covers IEEE 802.11i-based wireless LANs only.<\/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: 'e9fbff8de4',             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>\n<p>[\/et_pb_text][et_pb_divider _builder_version=&#8221;4.9.2&#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; 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;]Discussion [NIST SP 800-171 R2]<br \/>\nCryptographically-based and replay-resistant authentication between systems, components, and devices addresses the risk of unauthorized access from spoofing (i.e., claiming a false identity). The requirement applies to client-server authentication, server-server authentication, and device authentication (including mobile devices). The cryptographic key for authentication transactions is stored in suitably secure storage available to the authenticator application (e.g., keychain storage, Trusted Platform Module [TPM], Trusted Execution Environment [TEE], or secure element). Mandating authentication requirements at every connection point may not be practical, and therefore, such requirements may only be applied periodically or at the initial point of network connection.<br \/>\n[NIST SP 800-63-3] provides guidance on identity and authenticator management.<\/p>\n<p>Further Discussion<br \/>\nThe intent of this practice is to prevent unauthorized devices from connecting to one another. One example satisfying this requirement is a web server configured with transport layer security (TLS) using mutual authentication. At a lower level in the OSI stack, IPsec provides application-transparent mutual authentication. Another example would be implementing 802.1X technology to enforce port-based NAC. This is done by enabling 802.1X on switches, wireless access points, and VPN connections for a given network. 802.1X defines authentication controls for devices trying to access a given network. NAC controls authorization and policy management. For this to be implemented, bidirectional authentication must be turned on via 802.1X. Once successfully authenticated, the device may communicate on the network. A final example, at the application-server level, involves the use of Kerberos to control 1) which files a client can access and 2) the transmission of sensitive data from the client to the server.[\/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; z_index_tablet=&#8221;0&#8243; text_text_shadow_horizontal_length_tablet=&#8221;0px&#8221; text_text_shadow_vertical_length_tablet=&#8221;0px&#8221; 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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\" 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company_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\" 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":[461],"tags":[],"class_list":["post-15412","post","type-post","status-publish","format-standard","hentry","category-level-3"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>IA.L3-3.5.1E Bidirectional Authentication - 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-3\/ia-l3-3-5-1e\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"IA.L3-3.5.1E Bidirectional Authentication - DIB SCC CyberAssist\" \/>\n<meta property=\"og:description\" content=\"[et_pb_section fb_built=&#8221;1&#8243; 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