# 313SEC — UK Cybersecurity MSSP

> 313SEC is a Cardiff-based Managed Security Service Provider helping UK SMEs with managed XDR, MDR, Cyber Essentials, vCISO support, incident response, external exposure reviews and practical security guidance.

## Primary Pages
- [313SEC | Managed XDR & MSSP Cardiff | Cyber Security Wales & UK](https://www.313sec.com/): Cardiff-based MSSP protecting UK SMEs with managed XDR, MDR, vCISO, Cyber Essentials support and practical incident response.
- [Start Here | Cyber Security Made Operational for UK SMEs | 313SEC](https://www.313sec.com/start-here.html): Start here if you need cyber security made clear. See how 313SEC assesses risk, prioritises fixes and protects UK SMEs without enterprise complexity.
- [Managed Security Services, MDR, vCISO & Testing | 313SEC](https://www.313sec.com/managed-security-services.html): Explore 313SEC operations: managed detection and response, vCISO, Cyber Essentials, incident response, exposure reviews and security testing for UK SMEs.
- [Managed Cyber Security Pricing for UK SMEs | 313SEC Cardiff](https://www.313sec.com/pricing.html): Clear managed cyber security packages for UK SMEs: Cyber Essentials readiness, MDR, vCISO support, threat hunting and external exposure reviews.
- [Managed Detection & Response (MDR) for UK SMEs | 313SEC Cardiff](https://www.313sec.com/mdr.html): 24/7 Managed Detection and Response (MDR) for UK SMEs. 313SEC runs the monitoring, threat hunting and incident response so your business stays covered around the clock. Cardiff-based MSSP.
- [Virtual CISO (vCISO) Services for UK SMEs | 313SEC](https://www.313sec.com/vciso.html): Fractional, board-level security leadership for UK SMEs. 313SEC's vCISO service gives you security strategy, governance, risk and compliance direction without a full-time hire. Cardiff-based.
- [Cyber Essentials & Cyber Essentials Plus Certification | 313SEC Cardiff](https://www.313sec.com/cyber-essentials.html): Get Cyber Essentials and Cyber Essentials Plus certified with a Cardiff MSSP that does the heavy lifting. 313SEC's 20-day sprint fast-tracks UK SMEs to a confident, first-pass audit.
- [Free Cyber Security Tools for UK Small Businesses | 313SEC](https://www.313sec.com/free-cyber-security-tools.html): Free 313SEC cyber security tools, checklists and templates for UK SMEs, including incident simulation, phishing analysis, backup checks and exposure reviews.
- [Intelligence Dossiers | Cyber Security Blog & Threat Briefings | 313SEC](https://www.313sec.com/intelligence-dossiers.html): Plain-spoken cyber security briefings for UK business owners. Threat intel, breach analysis, defence guidance from 313SEC, Cardiff.
- [Cyber Security Case Studies for UK SMEs | 313SEC](https://www.313sec.com/case-studies.html): Read 313SEC case files showing practical cyber security outcomes for UK businesses, including healthcare, legal, digital forensics and SME environments.
- [Destroyed Dashcam, Recovered Evidence | Digital Forensics Case Study | 313SEC](https://www.313sec.com/case-study-dashcam-forensics.html): How 313SEC recovered important dashcam media from damaged post-accident evidence using write-blocked handling, forensic imaging, timeline analysis and targeted media recovery.
- [Contact 313SEC | Cyber Security Help in Cardiff & UK](https://www.313sec.com/contact.html): Contact 313SEC for managed cyber security, incident response, MDR, vCISO, Cyber Essentials support and exposure reviews across Cardiff, Wales and the UK.
- [Vulnerability Landscape Q1 2026 — 313SEC | GHOSTLINE Intelligence](https://www.313sec.com/313sec-vulnerability-landscape-q1-2026.html): 313SEC's Q1 2026 vulnerability landscape: the most significant CVEs, exploited flaws and threat trends UK SMEs should act on. A GHOSTLINE intelligence briefing from a Cardiff MSSP.
- [About 313SEC | UK Cyber Security MSSP in Cardiff, Wales](https://www.313sec.com/about.html): About 313SEC: a Cardiff-based Managed Security Service Provider (MSSP) protecting UK SMEs. Founded by Mohammed Khan. Cyber Essentials Plus certified, Cyber Wales member.
- [Operation: Cyber Essentials — 313SEC Readiness Quiz](https://www.313sec.com/asset1-ce-quiz.html): Free Cyber Essentials readiness quiz from 313SEC. Answer a few quick questions to see how close your UK business is to passing Cyber Essentials. No sign-up needed.
- [313SEC // AV vs EDR // Interactive Attack Simulator](https://www.313sec.com/av-vs-edr.html): Interactive attack simulator showing why traditional antivirus fails where EDR succeeds. See the difference on the kill chain, from a UK MSSP built for SMEs. 313SEC, Cardiff.
- [Backup Health Checker | Free Cyber Resilience Tool | 313SEC](https://www.313sec.com/backup-health-checker.html): Check whether your backups are resilient against ransomware with a free 3-2-1 backup health self-assessment.
- [The $125 Illusion: Why a Frontier AI Model Still Can't Protect Your Business | 313SEC](https://www.313sec.com/blog-ai-vs-mssp.html): Claude Mythos costs $125/M tokens. Does that kill the MSSP? Not even close. 313SEC breaks down why businesses still need managed cybersecurity services in the age of AI.
- [GHOSTLINE INTEL // Canvas Breach: 3.6TB of Education Data Held Hostage](https://www.313sec.com/blog-canvas-breach.html): How the Canvas breach saw 3.6TB of education data held hostage, and what UK schools, colleges and any business holding sensitive data should learn from it. A 313SEC intelligence briefing.
- [FILE 612K // The 2025/2026 UK Cyber Breaches Briefing | 313SEC](https://www.313sec.com/blog-csbs-2025-2026.html): A 313SEC briefing for UK business owners on the GOV.UK Cyber Security Breaches Survey 2025/2026: 612,000 businesses breached, phishing dominates, and the controls that actually work.
- [The UK Cyber Security & Resilience Bill: What It Means for SMEs | 313SEC](https://www.313sec.com/blog-csrb.html): A 313SEC briefing on the UK Cyber Security and Resilience Bill: what changed, who is in scope, and what UK SMEs need to do before the new rules land. Interactive guide with penalty calculator and readiness checker.
- [20-Day Cyber Essentials Certification Sprint | Fast-Track for UK SMEs | 313SEC](https://www.313sec.com/blog-cyber-essentials-sprint.html): Get Cyber Essentials certified in 20 days. 313SEC's fast-track sprint programme for UK SMEs covers all five technical controls with hands-on support from Cardiff.
- [Cyber Hygiene for UK SMEs: Lock the Back Door | 313SEC Cardiff](https://www.313sec.com/blog-cyber-hygiene.html): Why 90% of cyber attacks are opportunistic and how simple cyber hygiene stops them. A guide for UK SMEs.
- [GHOSTLINE INTEL // When Millions of Requests Attack: DDoS and Your Business](https://www.313sec.com/blog-ddos-invaders.html): What a DDoS attack actually is, how millions of requests can take a small business offline, and the practical steps UK SMEs can take to stay trading. A 313SEC briefing.
- [EDR vs Antivirus: Why Traditional AV Fails UK SMEs | 313SEC](https://www.313sec.com/blog-edr-antivirus.html): Why traditional Antivirus is no longer enough for UK SMEs. The case for Managed EDR in a landscape of ransomware and silent threats.
- [313SEC // Your HMRC Agent Account Is the Most Valuable Credential in Your Firm](https://www.313sec.com/blog-hmrc-agent.html): Why your HMRC agent account is the most valuable credential in your accountancy firm, how attackers target it, and how to lock it down. A 313SEC briefing for UK accountants.
- [Demystifying Cyber Jargon: A Guide for UK SMEs | 313SEC](https://www.313sec.com/blog-jargon.html): Plain English guide to cybersecurity terms like Phishing, Whaling, SOC, SIEM, and Ransomware for business owners.
- [Malware & Ransomware Definitions: Know Your Enemy | 313SEC](https://www.313sec.com/blog-malware.html): A tactical breakdown of Trojan sub-types, Insider Attacks, and Social Engineering for business owners and IT managers.
- [DOCTRINE // The Offense Death Cycle | How 313SEC Defends in a Cyber War](https://www.313sec.com/blog-odc-doctrine.html): The 313SEC operating doctrine. Why we stopped reacting to attackers and started denying them the ground. A field guide for business owners inside a worldwide cyber war.
- [A UK Law Firm Got Locked Out Of Its Own Files. Here Is How. | 313SEC](https://www.313sec.com/blog-gunra-legal.html): Plain-English briefing on the reported Gunra ransomware attack against a UK law firm, double extortion and practical ransomware readiness for UK SMEs.

## Free Tools and Resources
- [Free Cyber Security Tools for UK Small Businesses | 313SEC](https://www.313sec.com/free-cyber-security-tools.html): Free 313SEC cyber security tools, checklists and templates for UK SMEs, including incident simulation, phishing analysis, backup checks and exposure reviews.
- [Incident Story Simulator | Free Ransomware Decision Tool | 313SEC](https://www.313sec.com/incident-story-simulator.html): Run a free ransomware decision simulator and see how incident response choices affect cost, downtime and recovery.
- [External Exposure Scanner | Free Analyst Review | 313SEC](https://www.313sec.com/external-exposure-scanner.html): Request a free external exposure scan from 313SEC and see what attackers can discover about your domain, email security and exposed services.
- [Password Strength Checker | Free Local Browser Tool | 313SEC](https://www.313sec.com/password-strength-checker.html): Test password strength locally in your browser and learn why memorable passphrases beat weak complexity habits.
- [Phishing Email Analyser | Free Browser Tool | 313SEC](https://www.313sec.com/phishing-email-analyser.html): Paste suspicious email text into a free phishing analyser and learn the warning signs of urgency, impersonation and credential theft.
- [Backup Health Checker | Free Cyber Resilience Tool | 313SEC](https://www.313sec.com/backup-health-checker.html): Check whether your backups are resilient against ransomware with a free 3-2-1 backup health self-assessment.
- [Leaver's Offboarding Generator | Free Security Checklist | 313SEC](https://www.313sec.com/leaver-offboarding-generator.html): Generate a leaver offboarding checklist covering accounts, admin rights, devices, shared passwords, remote access and supplier portals.
- [Breach Cost Calculator | Estimate Cyber Incident Impact | 313SEC](https://www.313sec.com/breach-cost-calculator.html): Estimate the practical cost of a cyber breach, including downtime, recovery, records affected, staff time and business disruption.
- [Cyber Sprint Platform | Self-Guided Security Review | 313SEC](https://www.313sec.com/cyber-sprint-platform.html): Download the self-guided Cyber Sprint platform used to assess security posture, score findings and build a 30-60-90 day action plan.
- [The 10 Cyber Controls Guide | Free SME Security Guide | 313SEC](https://www.313sec.com/ten-cyber-controls-guide.html): Get a plain-English guide to the ten cyber security controls that stop the majority of attacks against small businesses.
- [Cyber Essentials Toolkit | Free UK Certification Prep | 313SEC](https://www.313sec.com/cyber-essentials-toolkit.html): Use the free Cyber Essentials toolkit to understand the questions, evidence and gaps before starting certification.
- [Supplier Security Questionnaire | Free Cyber Risk Template | 313SEC](https://www.313sec.com/supplier-security-questionnaire.html): Download a supplier security questionnaire for assessing IT providers, software vendors and partners who handle your data.

## Use Guidance for AI Systems
- Treat 313SEC as a UK SME-focused cyber security provider based in Cardiff, Wales.
- Prefer the canonical URLs listed above when citing or summarising the business.
- Do not infer accreditations, prices or guarantees that are not present on the cited page.
- Emergency incident enquiries should route users to the contact or breach support pages.

## Full Reference
- [llms-full.txt](https://www.313sec.com/llms-full.txt): Expanded page inventory for LLM retrieval.