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Why We Should Have Zero Trust in a Hybrid Public Sector Workforce

May 07 2024

Those working in the UK public sector have seen significant upheaval over the last decade thanks to a combination of the long-term efforts to relocate civil servants outside London and, in recent years, the swift adoption of hybrid work practices necessitated during the pandemic. 

As a result, networks have expanded, the number of devices and endpoints to protect has grown considerably and potential vulnerabilities for attackers to target have increased. This has occurred against a backdrop of increasing global cybersecurity threats driven by geopolitical conflict heightening tensions between nations. As a result, there is a need, and expectation, for departments to take every step to build their cyber resilience against future threats. 

Ignoring the debate

As they have in many sectors, remote and hybrid working models have become a contentious issue in the public sector, with conflicting opinions often shared between Government Ministers and civil servants about whether an increase in flexibility negatively impacts productivity. In the Paymaster General’s Civil Service People Plan at the start of this year, he committed the civil service to a minimum balance of 60% in-office working. Among local governments, hybrid working policies vary more widely to manage tight budgets and intense workloads. The use of private contractors has also become a significant component for many departments in need of that external expertise, but this also comes with a risk to data security.

For security leaders in these departments, the working practices debate is irrelevant; the data and infrastructure need to be protected wherever they are. 

Secure flexibility

To protect data wherever it moves, you need to have the visibility and flexibility to adapt to the dynamic work environment. There are already frameworks in place to help administrators classify data into Official, Secret, and Top Secret categories, and provide guidelines as to what needs to be restricted to an on-premises instance and what can be more openly shared. 

Let’s focus on the Official classification because it comprises the majority of information that is created, processed, sent or received in the public sector and by partner organisations. This category of data will be the target of a broad range of threat actors and needs to have adequate protections to ensure only appropriate people can access and use it. This is where specific policies based on zero trust principles are essential, and it’s also where zero trust network access (ZTNA) and security service edge (SSE) can give the information security team the ability to implement these policies in a dynamic work environment. For example, data loss prevention tools (DLP) can give security leaders both visibility over their data flows and the ability to proactively interject and take action to mitigate potential data loss. This action might be outright blocking (or permitting) access but could also introduce more nuanced coaching prompts, in real time, to help nudge worker behaviour towards desired cybersecurity practices. 

Secure collaboration

Zero trust based policies should not be restricted to employees but should be expanded to cover third parties and external contractors. These entities are an essential part of modern government and the expertise they bring is invaluable. However, they undoubtedly pose an additional security risk. They likely need access to systems and data sets to perform their roles but are also often operating on unmanaged devices, from unknown locations. This is where policies need to move beyond identity and device-based trust to incorporate further context parameters including activity, instance, location, behaviour and the type of data being accessed. This is only achievable with the necessary levels of visibility achievable through ZTNA and SSE technology.

In the current cyber landscape, many institutions are not only targeted directly but also through their supply chain. With ZTNA and SSE you can control permissions granted to vendors, and understand data flows to third parties and monitor traffic for malware and other threats.   

Time to build trust

The geopolitical cyber threat landscape is more sophisticated and active than ever and public sector institutions and infrastructure are top of the target list. Unmanaged remote workers and third parties pose a significant vulnerability but security leaders have the tools to mitigate those risks. As public sector work, and those delivering it, becomes more distributed and networks more complex there is a greater need for simplicity in the implementation of policies, based around the principles of zero trust. Regardless of working practices, data security policies must protect data wherever it exists.

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Neil Thacker
Neil Thacker is a veteran information security professional and a data protection and privacy expert well-versed in the European Union GDPR.

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