The UK’s public sector is under siege. Not by visible enemies, but by a wave of cyber threats. In 2024, the National Cyber Security Centre reported a 16% increase in serious attacks impacting national security. These aren’t theoretical risks. They are real, growing, and increasingly sophisticated ranging from ransomware attacks shutting down local councils to state-sponsored attacks probing NHS infrastructure.
This rise in hostile activity has prompted urgent legislative attention. The UK government’s forthcoming Cyber Security and Resilience Bill aims to overhaul its aging regulatory frameworks. The bill promises expanded oversight over digital services and supply chains, stronger mandates on incident reporting, and enhanced powers for regulators.
These are vital steps, but policy alone won’t protect us. Resilience must be embedded deep into the technology stacks that underpin public services and that is where Zero Trust comes in.
Traditional security models are no longer effective
For decades, cybersecurity has operated on a perimeter-based model, also known as the “M&M” approach – a hard shell defending a soft, trusted interior. Once inside the network, users and systems were implicitly trusted.
Today’s environment renders that approach obsolete. The rise of cloud computing, mobile devices, and hybrid work has removed the perimeter altogether. Meanwhile, insider threats (whether malicious or accidental) are just as dangerous as external actors.
Zero Trust turns the traditional model on its head. It assumes no trust, even within the network and requires continuous verification of users, devices, and services, regardless of location or credentials. The principle is simple: trust nothing, verify everything.
Urgency for the UK public sector to adopt Zero Trust
Public institutions hold vast amounts of sensitive data. This includes everything from citizen health records to infrastructure blueprints, making them high-value targets for attackers. The UK Government’s Cyber Security Breaches Survey 2024 revealed that 50% of businesses and 32% of charities experienced breaches last year. The public sector, while not always included in these surveys, faces similar or even greater risks. Particularly as legacy systems and tight budgets hamper modernisation efforts.
Further complicating matters is the cybersecurity skills gap. Nearly 44% of UK businesses report a shortage in basic technical security skills. Public sector organisations, competing with the private sector for talent, are often unable to attract or retain the expertise they need to defend against today’s threats.
With trust in public services on the line, and financial and operational impacts rising, the time for passive risk management has passed. Zero Trust offers a proactive, scalable, and strategic framework to harden digital infrastructure.
Making Zero Trust a reality
At the heart of Zero Trust is identity – the new security perimeter. With over 81% of all data breaches linked to compromised credentials, managing identity effectively is the most impactful step organisations can take. But it’s not just about adopting individual safeguards. It’s about layering them into a cohesive, adaptive defence.
● Multi-Factor Authentication (MFA): MFA acts as the first barrier, requiring users to prove their identity through multiple factors. This includes passwords, a mobile authentication app, or biometric check. This simple step can prevent more than 90% of common attacks, including phishing and credential stuffing.
● Password management and SSH Keys: Good credential hygiene reinforces MFA. Enforcing strong, unique passwords (ideally through a centralised password manager) reduces the risk of brute force or reuse attacks. Secure Shell keys offer stronger authentication for privileged access but must be rotated and managed properly to avoid introducing new risks.
● Mobile Device Management (MDM): As workforces become more mobile and hybrid, organisations need visibility and control over endpoints. MDM tools ensures that only compliant, up-to-date devices can connect, allowing teams to enforce policies, push updates, and remotely wipe data if needed.
● Policy-driven access controls: Zero Trust assumes breach. That’s why access decisions must consider more than just roles, but also factor in device health, location, time, and behaviour. Dynamic access policies and continuous monitoring help detect anomalies early and limit lateral movement.
Together, these tools create a strong, flexible posture that adjusts to user context and validates trust continuously.
Modern cloud-based identity and access management (IAM) platforms bring these capabilities together, making them easier to deploy and manage, even for resource-constrained organisations. By integrating MFA, credential policies, MDM, and access controls in one place, IAM solutions offer a scalable foundation for Zero Trust, and a powerful defence against today’s most pressing cyber threats.
The operational payoff
Adopting Zero Trust isn’t just about defence; it is about operational efficiency. Research shows organisations with Zero Trust frameworks in place are twice as likely to avoid critical outages due to attacks. On top of that, an automated Zero Trust strategy can free up as much as 40 person-hours per week, giving overstretched IT teams the much-needed capacity to focus on proactive initiatives.
For the UK public sector, which is already juggling regulatory demands, outdated infrastructure, and resource shortages, this is a compelling value proposition.
A future built on trust (and verification).
Cybersecurity is a national resilience and economic growth imperative. Put simply, a secure digital environment allows public institutions to innovate confidently, attract investment, and deliver uninterrupted services to citizens.
As the Cyber Security and Resilience Bill progresses through Parliament, it’s crucial that Zero Trust isn’t treated as optional. Instead, it must be viewed as a foundational pillar and one that is baked into procurement standards, digital transformation roadmaps, and organisational culture.
Implementing Zero Trust requires a mindset shift as it challenges traditional notions of trust, freedom, and access. But in today’s threat landscape, what was once considered excessive caution is now a necessary standard in cybersecurity. The organisations that adopt this principle now will be better positioned to lead the UK into a secure digital future.
