{"id":125612,"date":"2026-09-09T13:46:40","date_gmt":"2026-09-09T12:46:40","guid":{"rendered":"https:\/\/www.realvnc.com\/?post_type=blog&#038;p=125612"},"modified":"2026-09-03T11:59:37","modified_gmt":"2026-09-03T10:59:37","slug":"secure-contractor-access-to-factory-systems","status":"publish","type":"blog","link":"https:\/\/www.realvnc.com\/en\/blog\/secure-contractor-access-to-factory-systems\/","title":{"rendered":"Secure Contractor Access to Factory Systems: Governance Risks"},"content":{"rendered":"<p>During a production maintenance window, the pressure is immediate. A specialist needs to diagnose an HMI or PLC, and the plant team must keep authority over the systems that keep operations moving. When approval, identity, and session records sit apart, the delay lands on operations and the accountability gap lands on leadership.<\/p>\n<p><strong>Secure contractor access to factory systems means allowing a verified external technician to reach only the approved industrial asset, through an approved route, for a defined maintenance task and time window. The organization records the authorization and session, then confirms that permissions end when the work closes, so an urgent support request remains an accountable operational event.<\/strong><\/p>\n<p>The weakness often begins with an exception that feels temporary: a standing vendor account, reusable credentials, or a direct connection added to complete a time-sensitive task. Factory environments make that choice harder: older equipment may not enforce modern identity controls, yet a poorly governed remote session can affect production availability, safety processes, and the evidence available after work ends.<\/p>\n<p>This article sets out the Identity\u2013Intent\u2013Path\u2013Evidence model for contractor access. It explains how to tie permissions to a work order, select a mediated route into the OT zone, govern scheduled and emergency sessions, and retain the records leaders need for review. It also identifies the audit failures that leave teams unable to show who accessed an asset, under whose authority, and whether access ended as approved.<\/p>\n<h2 id=\"why-is-secure-contractor-access-to-factory-systems-urgent\">Why Is Secure Contractor Access to Factory Systems Urgent?<\/h2>\n<p>Secure contractor access to factory systems is urgent: remote maintenance now reaches assets whose availability affects production schedules, safety processes, and customer commitments. The governing question is not whether a specialist needs access; it is whether that access is tied to a named person, a defined task, an approved route, and a clear end point.<\/p>\n<p>Direct connectivity leaves too much to assumption. <a href=\"https:\/\/go.censys.com\/rs\/120-HWT-117\/images\/2024SOTIR.pdf\">Censys\u2019 2024 State of the Internet Report &#8211; Industrial Control Systems<\/a> observed more than 145,000 internet-facing industrial control system services globally, including more than 48,000 in the United States. That figure does not show which connections are authorized, but it shows why leaders need to identify every path into production networks.<\/p>\n<p>CISA\u2019s <a href=\"https:\/\/www.cisa.gov\/resources-tools\/resources\/primary-mitigations-reduce-cyber-threats-operational-technology\">2025 OT mitigations guidance<\/a> recommends removing OT connections from the public internet, noting that devices may lack authentication and authorization suited to current threats. A mediated route gives IT, OT engineering, and the asset owner a decision point before work begins and after it ends.<\/p>\n<h3 id=\"which-pressures-make-remote-ot-access-harder-to-govern\">Which pressures make remote OT access harder to govern?<\/h3>\n<ul>\n<li><strong>Internet exposure:<\/strong> A reachable service can become an unmanaged maintenance path when its owner, purpose, or approval record is unclear.<\/li>\n<li><strong>Specialist dependency:<\/strong> Original equipment manufacturers and integrators often hold knowledge that plant teams need during planned work and urgent diagnosis.<\/li>\n<li><strong>Legacy asset constraints:<\/strong> Older PLCs, human-machine interfaces (HMIs), and supervisory control and data acquisition (SCADA) systems may not support modern identity controls themselves.<\/li>\n<li><strong>Audit accountability:<\/strong> Leaders need evidence that access matched the work order, particularly when a session reaches a production zone.<\/li>\n<\/ul>\n<p>Think of direct contractor connectivity as handing over a building key that works every day. A governed workflow issues a work-order key: it opens only the approved production area, for the technician named on the task, during the agreed window.<\/p>\n<table>\n<thead>\n<tr>\n<th>Legacy contractor-access pattern<\/th>\n<th>Governed factory-access pattern<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Access duration: persistent account<\/td>\n<td>Access duration: task-bound expiry<\/td>\n<\/tr>\n<tr>\n<td>Connection path: direct route to the environment<\/td>\n<td>Connection path: approved mediated route<\/td>\n<\/tr>\n<tr>\n<td>Identity assurance: account ownership assumed<\/td>\n<td>Identity assurance: named worker verified before use<\/td>\n<\/tr>\n<tr>\n<td>Evidence retained: disconnected tickets or logs<\/td>\n<td>Evidence retained: approval, session record, and revocation proof<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>This shift improves decision rights around maintenance. Production availability remains the priority. Each connection becomes a controlled operational event rather than an informal exception.<\/p>\n<h2 id=\"which-model-governs-remote-ot-contractor-access\">Which Model Governs Remote OT Contractor Access?<\/h2>\n<p>A practical model for remote OT contractor access has four linked dimensions: <strong>Identity, Intent, Path, and Evidence<\/strong>. It asks who the contractor is, what work they are approved to perform, how they will reach the asset, and what record remains when access ends. The model gives leaders a repeatable way to govern emergency OEM support, scheduled PLC maintenance, SCADA upgrades, and vendor diagnostics.<\/p>\n<p>Factory Zero Trust principles apply through context, not through a single product choice. Danielle Jablanski, ICS Cybersecurity Strategist at CISA, <a href=\"https:\/\/gca.isa.org\/blog\/in-conversation-with-authors-of-isagca-whitepaper-on-zero-trust-and-isa\/iec-62443\">told ISAGCA<\/a>: \u201cThere is no one-size-fits-all or commercial off-the-shelf deployment of \u2018zero trust.\u2019\u201d A multi-site manufacturer may use different connection patterns by asset criticality, protocol age, and maintenance urgency and still hold every workflow to the same decision standard.<\/p>\n<ol>\n<li><strong>Identity:<\/strong> Confirm the person, organization, and role. The identity must map to a real contractor rather than a generic vendor account that several people could use.<\/li>\n<li><strong>Intent:<\/strong> Define the task, asset scope, approver, and expiry. A work order should state whether the technician needs an HMI view, PLC engineering access, or a SCADA function.<\/li>\n<li><strong>Path:<\/strong> Select the mediated route between the contractor endpoint and the OT zone. The route must reflect service criticality and the network boundary the work will cross.<\/li>\n<li><strong>Evidence:<\/strong> Retain records proving authorization, session activity, and revocation. Those records let leaders reconstruct a decision without chasing email threads after the event.<\/li>\n<\/ol>\n<table>\n<thead>\n<tr>\n<th>Framework dimension<\/th>\n<th>Executive decision<\/th>\n<th>Control signal<\/th>\n<th>Primary evidence source<\/th>\n<th>Common misread<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Identity<\/td>\n<td>Who is permitted to act?<\/td>\n<td>Named identity and authentication result<\/td>\n<td>Identity record<\/td>\n<td>A vendor company name proves the individual user<\/td>\n<\/tr>\n<tr>\n<td>Intent<\/td>\n<td>What work is approved?<\/td>\n<td>Asset scope, task, and expiry<\/td>\n<td>Work order approval<\/td>\n<td>A contract grants access to every system<\/td>\n<\/tr>\n<tr>\n<td>Path<\/td>\n<td>How does access reach OT?<\/td>\n<td>Approved connection route<\/td>\n<td>Network and access record<\/td>\n<td>Any encrypted route is automatically suitable<\/td>\n<\/tr>\n<tr>\n<td>Evidence<\/td>\n<td>What proves control worked?<\/td>\n<td>Session, approval, and closure record<\/td>\n<td>Audit record<\/td>\n<td>Authentication alone supplies full accountability<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>The <a href=\"https:\/\/www.isa.org\/news-press-releases\/2024\/august\/new-isagca-report-explores-zero-trust-outcomes-in\">ISA Global Cybersecurity Alliance\u2019s 2024 guidance<\/a> advises against introducing Zero Trust for \u201cessential functions\u201d defined in ISA\/IEC 62443, and stresses that availability and safety constraints must shape OT use. That is a useful boundary: apply stronger decision controls around access without disrupting functions that keep the plant operating safely.<\/p>\n<p>All four dimensions must align. Multi-factor authentication (MFA) confirms a person, but it does not correct an overly broad asset scope, an unsuitable connection route, or a missing session record.<\/p>\n<h2 id=\"what-controls-contain-vendor-access-to-plcs-and-scada\">What Controls Contain Vendor Access to PLCs and SCADA?<\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/www.realvnc.com\/wp-content\/uploads\/2026\/08\/nanobana_img3_Section_2_Why_Is_Secure_Contractor_Access_to_Facto_1787660786801.jpg)\" alt=\"\"><\/p>\n<p>Effective controls separate identity, authorization, connection routing, and evidence rather than expecting one safeguard to cover every gap. Leaders need a control set that limits access to the approved work and respects legacy protocols, maintenance urgency, and plant safety requirements.<\/p>\n<p>CISA\u2019s <a href=\"https:\/\/www.cisa.gov\/resources-tools\/resources\/primary-mitigations-reduce-cyber-threats-operational-technology\">2025 OT guidance<\/a> advises organizations to document remote access according to least privilege for the specific asset and user role or scope of work, then disable dormant accounts. The <a href=\"https:\/\/www.isa.org\/getmedia\/12ce5956-3047-4820-899c-5158722039d9\/ISAGCA_Applying-ISO-IEC-27001-2-and-the-62443-Series_White-Paper_2025.pdf\">ISA Global Cybersecurity Alliance\u2019s 2025 paper<\/a> likewise identifies authorized remote applications and authorized interactive remote connections within ISA\/IEC 62443-2-1.<\/p>\n<ol>\n<li><strong>Named identities and MFA:<\/strong> Tie each session to an individual and add a second identity check. This supports attribution and reduces dependence on reusable vendor credentials.<\/li>\n<li><strong>Asset-scoped authorization:<\/strong> Limit access to the approved PLC, HMI, engineering workstation, or SCADA function. The asset owner must approve scope rather than leaving that decision to a general IT account.<\/li>\n<li><strong>Mediated connection paths:<\/strong> Use an OT demilitarized zone (OT DMZ), jump host, bastion host, zero trust network access (ZTNA), or clientless isolation pattern suited to the service. The architecture needs to separate the contractor endpoint from the protected OT zone.<\/li>\n<li><strong>Just-in-time permissions and credential rotation:<\/strong> Grant permissions for the approved time window, then remove access when the task closes. Rotate credentials where the workflow uses shared administrative secrets.<\/li>\n<li><strong>Session monitoring and recording:<\/strong> Create oversight during sensitive work and preserve material for incident review. Recording must follow applicable legal, contractual, regulatory, and incident-response requirements.<\/li>\n<\/ol>\n<table>\n<thead>\n<tr>\n<th>Control category<\/th>\n<th>What it signals<\/th>\n<th>Decision supported<\/th>\n<th>Common pitfall<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Named identities and MFA<\/td>\n<td>The user is attributable<\/td>\n<td>Whether the named technician may begin<\/td>\n<td>Treating a vendor account as individual identity proof<\/td>\n<\/tr>\n<tr>\n<td>Asset-scoped authorization<\/td>\n<td>Access matches the work order<\/td>\n<td>Which systems and actions are permitted<\/td>\n<td>Granting a whole network segment for one task<\/td>\n<\/tr>\n<tr>\n<td>Mediated connection paths<\/td>\n<td>OT boundary crossing is deliberate<\/td>\n<td>Which route fits the asset and service need<\/td>\n<td>Assuming a remote method fits every legacy system<\/td>\n<\/tr>\n<tr>\n<td>Just-in-time permissions and credential rotation<\/td>\n<td>Access has an end point<\/td>\n<td>When permissions must close<\/td>\n<td>Leaving accounts active after maintenance ends<\/td>\n<\/tr>\n<tr>\n<td>Session monitoring and recording<\/td>\n<td>Oversight and review are possible<\/td>\n<td>Whether work needs supervision<\/td>\n<td>Recording a session without its approval context<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Assess progress by the discipline of each access event, not against a universal maturity score. A plant improves when fewer permissions remain after work closes and every sensitive session has a clear owner, scope, and evidence trail.<\/p>\n<h2 id=\"how-do-leaders-govern-the-contractor-access-lifecycle\">How Do Leaders Govern the Contractor Access Lifecycle?<\/h2>\n<p>The contractor lifecycle joins procurement, plant operations, OT engineering, security, and vendor management around one access decision. <a href=\"https:\/\/www.mxdusa.org\/app\/uploads\/2024\/06\/Behind-the-Firewall_Assessing-Cyber-Resilience-in-US-Manufacturing.pdf\">MxD\u2019s 2024 manufacturing resilience report<\/a> found that 68% of manufacturers embedded cybersecurity requirements in contracts, yet only 31% rated those requirements as comprehensive. Contract language matters, but it must carry through to each maintenance session.<\/p>\n<ol>\n<li><strong>Step #1: Approve the support relationship.<\/strong> Confirm contract terms, safety or compliance prerequisites, the vendor sponsor, and the asset owner. Procurement owns the supplier relationship, and the plant confirms that the work is legitimate. The failure mode is approval that exists only at contract signature; success means responsibility is named before a technician requests access.<\/li>\n<li><strong>Step #2: Define the access work order.<\/strong> Specify the task, systems, connection method, time window, and escalation contact. OT engineering owns technical scope, and the asset owner approves operational timing. The failure mode is a vague request for \u201cmaintenance access\u201d; success means another reviewer can tell exactly what the technician needs to do.<\/li>\n<li><strong>Step #3: Authorize and supervise the session.<\/strong> Validate identity, approve the start, and apply monitoring that matches the work\u2019s sensitivity. Security owns identity policy, and plant operations decides whether the maintenance window remains viable. The failure mode is a session beginning after conditions change; success means the approver can pause or end access when scope shifts.<\/li>\n<li><strong>Step #4: Close, revoke, and review.<\/strong> Terminate permissions, rotate credentials where relevant, preserve evidence, and capture exceptions. The access owner confirms closure. The failure mode is treating the end of work as self-evident; success means the record shows that access ended.<\/li>\n<\/ol>\n<p>Consider scheduled OEM HMI support during a planned maintenance window. The work order names the HMI, the vendor technician, the approved connection path, a defined duration, and the OT engineer who can approve a scope change. When the session closes, the record links the authorization, activity, and closure decision in one reviewable chain.<\/p>\n<p>This lifecycle gives emergency support a disciplined route. CISA, FBI, EPA, and DOE include contractors\u2019 remote access to OT assets in <a href=\"https:\/\/www.cisa.gov\/resources-tools\/resources\/primary-mitigations-reduce-cyber-threats-operational-technology\">CISA\u2019s 2025 mitigation guidance<\/a>; urgency changes the approval speed, not the need for accountable scope and closure.<\/p>\n<h2 id=\"the-4-audit-failures-in-factory-contractor-access\">The 4 Audit Failures in Factory Contractor Access<\/h2>\n<p>Audit gaps become visible when leaders need to answer a simple question after a session: who reached which asset, under whose authority, and what happened next? Those answers support incident review, vendor oversight, and operational learning. They also show whether a process held when plant conditions became difficult.<\/p>\n<p>The consequence of incomplete evidence is operational, not merely administrative. <a href=\"https:\/\/ics-cert.kaspersky.com\/publications\/reports\/2025\/02\/19\/q3-2024-a-brief-overview-of-the-main-incidents-in-industrial-cybersecurity\/\">Kaspersky ICS CERT\u2019s 2025 review of Q3 2024 incidents<\/a> found that 71% of 58 publicly confirmed industrial incidents involved ransomware; 66% affected manufacturing victims. 31% caused denial of operations. Separately, <a href=\"https:\/\/waterfall-security.com\/wp-content\/uploads\/2025\/03\/2025-OT-Cyber-Security-Threat-Report.pdf\">Waterfall Security\u2019s 2025 OT Cyber Security Threat Report<\/a> reports that Exco Tech shut down production at three plants for two weeks following a LockBit 3.0 ransomware event. That case does not establish a particular access cause, but it illustrates why production leaders need records that support rapid reconstruction.<\/p>\n<table>\n<thead>\n<tr>\n<th>Audit failure<\/th>\n<th>Operational consequence<\/th>\n<th>Evidence\/control response<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Shared identities<\/td>\n<td>The organization cannot attribute actions to one person<\/td>\n<td>Use named contractor identities and authentication records<\/td>\n<\/tr>\n<tr>\n<td>Approval outside the access system<\/td>\n<td>Reviewers cannot connect authorization to the session<\/td>\n<td>Link the work order, approver, and access event<\/td>\n<\/tr>\n<tr>\n<td>Missing session evidence<\/td>\n<td>Teams cannot review actions or scope changes<\/td>\n<td>Retain monitoring, recording, and activity records where required<\/td>\n<\/tr>\n<tr>\n<td>Dormant contractor entitlements<\/td>\n<td>Former work permissions remain available<\/td>\n<td>Review and remove access at task closure and expiry<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<ul>\n<li><strong>Attribution:<\/strong> Can you identify the individual contractor rather than only their employer?<\/li>\n<li><strong>Authorization:<\/strong> Can you show the asset owner\u2019s approval, task scope, and time window?<\/li>\n<li><strong>Activity:<\/strong> Can reviewers determine what occurred during the access event?<\/li>\n<li><strong>Expiry:<\/strong> Can you prove that permissions ended when the approved work ended?<\/li>\n<\/ul>\n<p>If these answers sit in disconnected systems, start with the access paths serving the most critical production assets. A single joined record is more useful than a large volume of logs with no link to the original decision.<\/p>\n<h2 id=\"how-realvnc-closes-the-factory-contractor-access-gap\">How RealVNC Closes the Factory Contractor-Access Gap<\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/www.realvnc.com\/wp-content\/uploads\/2026\/08\/nanobana_img6_Section_5_How_Do_Leaders_Govern_the_Contractor_Acc_1787660862243.jpg)\" alt=\"\"><\/p>\n<p>The Identity\u2013Intent\u2013Path\u2013Evidence model breaks down when OEM troubleshooting, PLC engineering support, and SCADA maintenance rely on standing accounts or a shared support credential. Plant teams need a repeatable way to admit a named external technician for a defined job, maintain appropriate oversight during the session, and show what happened after the maintenance window closes.<\/p>\n<p>RealVNC Connect maps its controls to that workflow. <strong>Code Connect<\/strong> uses single-use 9-digit session codes for time-bound third-party access, giving a technician a defined route without issuing standing credentials. <strong>Multi-factor authentication<\/strong> adds identity verification before access is granted. <strong>Role-based access controls (RBAC)<\/strong> and granular action-based permissions let administrators limit approved actions, including keyboard, mouse, and file transfer, to the session\u2019s purpose. <strong>Session monitoring, recording, and detailed audit logs<\/strong> give authorized administrators visibility during remote work and retain records of who connected, when, and with which permissions.<\/p>\n<p>That combination supports a more accountable contractor-access process across industrial sites. Teams can align a temporary support session with the asset owner\u2019s approval, end access when work finishes, and retain audit-ready evidence without turning routine maintenance into a standing remote channel.<\/p>\n<h2 id=\"final-words\">Final Words<\/h2>\n<p>Secure contractor access to factory systems works when each maintenance session is treated as a governed operational event. Start with the production assets and contractor workflows where a vague approval, standing credential, or disconnected record would carry the greatest consequence. Then apply Identity, Intent, Path, and Evidence together: verify the named technician, tie permissions to a defined task, use an approved route into the OT zone, and retain proof that access closed. That approach respects the performance, reliability, and safety needs that <a href=\"https:\/\/csrc.nist.gov\/News\/2023\/nist-publishes-sp-800-82-revision-3\">NIST\u2019s Guide to Operational Technology Security, SP 800-82 Rev. 3<\/a> places alongside cybersecurity in OT decisions (NIST, 2023).<\/p>\n<p>RealVNC Connect gives teams a practical way to put those decisions into daily support work. Code Connect establishes time-bound third-party sessions, multi-factor authentication verifies the user, and session recording with detailed audit logs preserves the review trail. As Andy Kling, VP of Cybersecurity at Schneider Electric, <a href=\"https:\/\/runsafesecurity.com\/blog\/ics-ot-security-software-supply-chain\/\">told RunSafe Security<\/a>: \u201cWe have to shift left and find out where we can improve in our own processes.\u201d Put the workflow in place before the next urgent support request turns a necessary maintenance task into an unmanaged access exception. Start a free trial of RealVNC Connect to establish time-bound, auditable contractor access for critical factory systems.<\/p>\n<h2 id=\"faqs\">FAQs<\/h2>\n<h3 id=\"what-is-the-identityintentpathevidence-model\">What is the Identity\u2013Intent\u2013Path\u2013Evidence model?<\/h3>\n<p>The Identity\u2013Intent\u2013Path\u2013Evidence model governs secure contractor access to factory systems by checking four connected decisions: who the technician is, what work they are approved to perform, how they reach the OT zone, and what evidence remains afterward. It prevents authentication from becoming the entire access strategy; a verified person may still have excessive asset scope or an unsuitable connection route.<\/p>\n<h3 id=\"what-is-the-difference-between-a-bastion-host-and-privileged-access-management\">What is the difference between a bastion host and privileged access management?<\/h3>\n<p>A bastion host is an architectural control point that mediates connections into a protected network zone. Privileged access management governs the broader workflow around privileged identities, authorization, credential handling, session oversight, and access revocation. The two approaches address different layers and are often assessed together for contractor connectivity to industrial assets.<\/p>\n<h3 id=\"which-standards-guide-third-party-ot-remote-access\">Which standards guide third-party OT remote access?<\/h3>\n<p>ISA\/IEC 62443 and NIST SP 800-82 Rev. 3 provide complementary guidance for third-party OT remote access. ISA\/IEC 62443-2-1 addresses authorized remote applications and interactive remote connections, and <a href=\"https:\/\/csrc.nist.gov\/News\/2023\/nist-publishes-sp-800-82-revision-3\">NIST\u2019s Guide to Operational Technology Security, SP 800-82 Rev. 3<\/a> requires security decisions to account for performance, reliability, and safety alongside cybersecurity (NIST, 2023). Organizations must then apply contractual requirements, sector rules, and local risk assessments to determine how controls are documented.<\/p>\n<h3 id=\"how-should-leaders-distinguish-access-architecture-from-identity-governance\">How should leaders distinguish access architecture from identity governance?<\/h3>\n<p>Access architecture defines the route between a contractor endpoint and the protected OT environment. Identity governance determines who may request, approve, use, and retain access. A bastion host or OT demilitarized zone (DMZ) does not establish whether the named technician has approval for a particular PLC or maintenance task. Leaders need both an appropriate connection path and a documented decision about identity, scope, duration, and closure.<\/p>\n<h3 id=\"how-does-realvnc-connect-support-contractor-access-workflows\">How does RealVNC Connect support contractor access workflows?<\/h3>\n<p>RealVNC Connect supports contractor workflows through Code Connect, multi-factor authentication (MFA), role-based access controls (RBAC), granular action-based permissions, session monitoring, session recording, and detailed audit logs. Code Connect uses single-use 9-digit session codes for time-bound third-party access. RealVNC Connect&#39;s other controls support identity verification, action limits, oversight, and reviewable session evidence. This gives plant IT and OT teams a defined workflow for temporary support without relying on a standing shared credential.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Secure contractor access to factory systems requires verified identities, limited sessions, and audit-ready evidence. One overlooked permission could leave your plant at risk\u2026<\/p>\n","protected":false},"author":37,"featured_media":125608,"template":"","blog_category":[271],"class_list":["post-125612","blog","type-blog","status-publish","has-post-thumbnail","hentry","blog_category-manufacturing"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.7 (Yoast SEO v28.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Secure Contractor Access to Factory Systems: Governance Risks<\/title>\n<meta name=\"description\" content=\"Secure contractor access to factory systems requires verified identities, limited sessions, and audit-ready evidence. 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