<?xml version="1.0" encoding="UTF-8"?><!--Serialized by the GTRI Trustmark Framework API, version: 1.4.74--><tf:TrustInteroperabilityProfile xmlns:tf="https://trustmarkinitiative.org/specifications/trustmark-framework/1.4/schema/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ds="http://www.w3.org/2000/09/xmldsig#"><tf:Identifier>https://artifacts.trustmarkinitiative.org/lib/tips/nist-sp-800-53-r4-security-control-si-4-_4__-inbound-and-outbound-communications-traffic/4/</tf:Identifier><tf:Name>NIST SP 800-53 r4 Security Control SI-4 (4): Inbound and Outbound Communications Traffic</tf:Name><tf:Version>4</tf:Version><tf:Description>Profile of requirements corresponding to NIST Special Publication 800-53, r4, Security Control SI-4 (4): Inbound and Outbound Communications Traffic. Applicable to MODERATE impact and HIGH impact systems.</tf:Description><tf:PublicationDateTime>2021-04-26T00:00:00.000Z</tf:PublicationDateTime><tf:Primary>false</tf:Primary><tf:LegalNotice>This document and the information contained herein is provided on an "AS IS" basis, and the Georgia Tech Research Institute disclaims all warranties, express or implied, including but not limited to any warranty that the use of the information herein will not infringe any rights or any implied warranties or merchantability or fitness for a particular purpose. In addition, the Georgia Tech Research Institute disclaims legal liability for any loss incurred as a result of the use or reliance on the document or the information contained herein.</tf:LegalNotice><tf:Issuer><tf:Identifier>https://trustmarkinitiative.org/</tf:Identifier><tf:Name>TMI</tf:Name><tf:Contact><tf:Kind>PRIMARY</tf:Kind><tf:Responder></tf:Responder><tf:Email>help@trustmarkinitiative.org</tf:Email><tf:Telephone>555-555-5555</tf:Telephone><tf:WebsiteURL>https://trustmarkinitiative.org/</tf:WebsiteURL></tf:Contact></tf:Issuer><tf:Keywords><tf:Keyword>800-53</tf:Keyword><tf:Keyword>High</tf:Keyword><tf:Keyword>Inbound</tf:Keyword><tf:Keyword>Information Integrity</tf:Keyword><tf:Keyword>Moderate</tf:Keyword><tf:Keyword>NIST</tf:Keyword><tf:Keyword>Outbound Communications Traffic</tf:Keyword><tf:Keyword>Security</tf:Keyword><tf:Keyword>System</tf:Keyword></tf:Keywords><tf:References><tf:TrustmarkDefinitionRequirement tf:id="TD_ref1"><tf:TrustmarkDefinitionReference><tf:Identifier>https://artifacts.trustmarkinitiative.org/lib/tds/information-system-monitoring-_-inbound-communications-traffic/1.0/</tf:Identifier><tf:Number>1</tf:Number><tf:Name>Information System Monitoring | Inbound Communications Traffic</tf:Name><tf:Version>1.0</tf:Version><tf:Description>Defines conformance and assessment criteria for verifying that an information system monitors inbound communications traffic at an organization-defined frequency for unusual or unauthorized activities or conditions.</tf:Description></tf:TrustmarkDefinitionReference></tf:TrustmarkDefinitionRequirement><tf:TrustmarkDefinitionRequirement tf:id="TD_ref2"><tf:TrustmarkDefinitionReference><tf:Identifier>https://artifacts.trustmarkinitiative.org/lib/tds/information-system-monitoring-_-outbound-communications-traffic/1.0/</tf:Identifier><tf:Number>2</tf:Number><tf:Name>Information System Monitoring | Outbound Communications Traffic</tf:Name><tf:Version>1.0</tf:Version><tf:Description>Defines conformance and assessment criteria for verifying that an information system monitors outbound communications traffic at an organization-defined frequency for unusual or unauthorized activities or conditions.</tf:Description></tf:TrustmarkDefinitionReference></tf:TrustmarkDefinitionRequirement></tf:References><tf:TrustExpression><![CDATA[TD_ref1 and TD_ref2]]></tf:TrustExpression><tf:Sources><tf:Source tf:id="Source-2112165102"><tf:Identifier>SP800-53R4</tf:Identifier><tf:Reference>NIST Special Publication 800-53 Revision 4, Security and Privacy Controls for Federal Information Systems and Organizations, National Institute of Standards and Technology, April 2013 (Includes updates as of 01-15-2014). Available at &lt;a href="http://dx.doi.org/10.6028/NIST.SP.800-53r4"&gt;http://dx.doi.org/10.6028/NIST.SP.800-53r4&lt;/a&gt;.</tf:Reference></tf:Source></tf:Sources></tf:TrustInteroperabilityProfile>