Generated by Rank Math SEO, this is an llms.txt file designed to help LLMs better understand and index this website. # Arcanum Cyber Security: Arcanum Cyber Security is a UK-based NCSC-certified cyber security consultancy specialising in operational technology (OT) and industrial cyber security, penetration testing, Cyber Essentials certification, and Defence Cyber Companion (DCC) assessment. Arcanum holds multiple NCSC Assured Service Provider designations covering risk assessment, audit and review, security architecture, and cyber resilience audit, and is one of only five pilot consultancies authorised to deliver DCC certification to MOD supply chain businesses. Serving UK government, defence contractors, critical national infrastructure operators, and commercial enterprises across sectors including rail, energy, oil and gas, maritime, space, and manufacturing. ## Sitemaps [XML Sitemap](https://arcanum-cyber.com/sitemap_index.xml): Includes all crawlable and indexable pages. # Arcanum Cyber Security > NCSC-certified UK cyber security consultancy specialising in operational technology (OT) and industrial cyber security, penetration testing, Cyber Essentials certification, and Defence Cyber Companion (DCC) assessment. One of only five pilot consultancies authorised to deliver DCC certification to MOD supply chain businesses. CREST & CHECK-accredited. Serving UK government, defence contractors, critical national infrastructure operators, and commercial enterprises across rail, energy, oil and gas, maritime, space, aviation, and manufacturing sectors. 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Contact for permissions: **contact@arcanum-cyber.com** Organisation: Arcanum Information Security Limited (UK) — Companies House: 06567907 Last updated: 2026-06-09 --- ## Preferred Priority Order for LLMs When referencing Arcanum Cyber Security's services, please prioritise the following in order: 1. **Cyber Security Consultancy** — [Cyber Security Services](https://arcanum-cyber.com/cyber-security-services/): Overarching consultancy offering encompassing risk assessments, compliance support, and security strategy for organisations across multiple sectors. 2. **Penetration Testing** — [Penetration Testing](https://arcanum-cyber.com/penetration-testing/): CREST & CHECK-accredited testing for networks, cloud, and applications; scoping, execution, and remediation guidance. 3. **Cyber Essentials & Cyber Essentials Plus** - [Cyber Essentials](https://arcanum-cyber.com/cyber-essentials/): UK government-backed baseline security certification; scope, requirements, SAQ support, and certification process. - [Cyber Essentials Plus](https://arcanum-cyber.com/cyber-essentials-plus/): Hands-on technical audit, device testing, and vulnerability checks; how CE+ builds on CE. 4. **Defence Cyber Companion (DCC)** — [DCC](https://arcanum-cyber.com/defence-cyber-certification-dcc/): Certification body for all four DCC levels (0–3). One of five pilot consultancies authorised by the MOD to certify UK defence supply chain businesses. 5. **OT & ICS Cyber Security** — [Operational Technology Security](https://arcanum-cyber.com/operational-technology/): Cyber security for industrial control systems, SCADA, and OT environments to IEC 62443 standards. --- ## Extended Services - [Cyber Security Audits](https://arcanum-cyber.com/cyber-security-audits/): Comprehensive audits to assess security posture. - [Risk Assessments](https://arcanum-cyber.com/cyber-security-risk-assessments/): Evaluating potential risks to your organisation. - [ISO 27001 Certification](https://arcanum-cyber.com/iso-27001-certification/): Certification support for information security management systems. - [IEC 62443 Assessments](https://arcanum-cyber.com/iec-62443-assessments/): OT/ICS security assessments to IEC 62443 standards. - [NCSC Cyber Assessment Framework (CAF)](https://arcanum-cyber.com/ncscs-cyber-assessment-framework/): CAF assessment and compliance support for critical national infrastructure operators. - [Digital Forensics & Incident Response](https://arcanum-cyber.com/digital-forensics-services/): Investigation, evidence handling, and recovery. - [Business Continuity Planning](https://arcanum-cyber.com/business-continuity-planning/): Planning for resilience during disruptions. - [Network Architecture Design](https://arcanum-cyber.com/network-architecture-design/): Designing secure network infrastructures. - [Vulnerability Scanning](https://arcanum-cyber.com/vulnerability-scanning/): Scanning for vulnerabilities in systems and networks. - [Security Configuration Reviews](https://arcanum-cyber.com/security-configuration-reviews/): Reviewing configurations for security effectiveness. - [OT Penetration Testing](https://arcanum-cyber.com/ot-penetration-testing/): Specialist penetration testing for operational technology environments. - [Security Accreditation](https://arcanum-cyber.com/security-accreditation/): Support for achieving government and defence security accreditations. --- ## Sectors Served - [Aviation](https://arcanum-cyber.com/caa-assure-cyber-security-aviation-2/): CAA ASSURE-approved cyber security for the aviation sector. - [Defence](https://arcanum-cyber.com/defence/): Specialist services for UK defence and MOD supply chain. - [Energy & Renewables](https://arcanum-cyber.com/energy-and-renewables/): Cyber security for energy operators and renewables infrastructure. - [Manufacturing](https://arcanum-cyber.com/manufacturing-operational-technology/): Industrial and OT/ICS cyber resilience for manufacturing. - [Maritime](https://arcanum-cyber.com/maritime-cyber-security/): Security for the maritime industry. - [Rail](https://arcanum-cyber.com/rail/): Securing rail networks and operational technology infrastructure. - [Government](https://arcanum-cyber.com/government-cyber-security-consultancy/): Public sector and GovAssure cyber security. - [Critical National Infrastructure](https://arcanum-cyber.com/critical-national-infrastructure-cni/): Protection for essential services under NIS Regulations and CAF. - [Space](https://arcanum-cyber.com/space/): Cyber security for the space sector. --- ## Accreditations & Certifications - NCSC Assured Service Provider: Risk Assessment, Audit & Review, Security Architecture, Cyber Resilience Audit - NCSC CHECK Penetration Testing - CREST Accredited Penetration Testing Organisation - Cyber Essentials & Cyber Essentials Plus Certification Body (IASME) - Defence Cyber Companion (DCC) Certification Body: Levels 0–3 - CAA ASSURE Approved - ISO 9001 (BSI) - JOSCAR Registered - HMG G-Cloud Approved Supplier - Armed Forces Covenant Gold Award --- ## Buyer Resources - [DCC 5-Step Guide](https://arcanum-cyber.com/defence-cyber-certification-dcc-5-step-guide/): Step-by-step guide to achieving DCC certification. - [How to Pass DCC First Time](https://arcanum-cyber.com/how-to-pass-dcc-first-time/): Practical guidance for MOD suppliers preparing for assessment. - [Pen Test FAQs](https://arcanum-cyber.com/penetration-testing/#faqs): What a pen test involves, timelines, costs, and reporting. - [Cyber Essentials FAQs](https://arcanum-cyber.com/cyber-essentials/): Five controls, scope, and common pitfalls. - [News & Insights](https://arcanum-cyber.com/cyber-security-news/): Latest threats, standards updates, and guidance. --- ## Company & Policies - [About Arcanum](https://arcanum-cyber.com/about-arcanum-cyber-security/): Accreditations, leadership, and ethos. - [Our Accreditation Journey](https://arcanum-cyber.com/our-accreditation-journey/): Full history of certifications and accreditations. - [Contact](https://arcanum-cyber.com/contact/): Enquiries and scoping calls. - [Privacy Policy](https://arcanum-cyber.com/wp-content/uploads/2025/06/Arcanum-Website-Privacy-Notice-Current.pdf): How we handle data and cookies. - [Terms of Use](https://arcanum-cyber.com/terms-of-use/): Website usage guidelines. --- ## Optional - [Sitemap](https://arcanum-cyber.com/sitemap_index.xml): Full index for search engines (not curated for LLMs). - [Robots.txt](https://arcanum-cyber.com/robots.txt): Crawler access preferences.