TSA Prompts Telcos to Urgently Rethink Network Infrastructure
Rethinking Resilience in a Volatile Digital Landscape
The UK’s digital backbone is undergoing a significant shift. With the Telecommunications Security Act (TSA) officially in force since 1st October 2022, telecom providers are facing more than just another compliance checkbox or regulatory hurdle. They now need to fundamentally rethink how they safeguard their infrastructure and operate their networks in an increasingly volatile digital landscape.
To do this, providers must move beyond the traditional ways of securing their infrastructure, and rethink resilience. Today, compliance is not just about meeting minimum standards but about embedding resilience into everyday operations.
The UK, like many other countries, is home to a competitive telecommunications market that serves 69 million residents and thousands of businesses. Recognizing the critical importance of securing the nation, the TSA regulation was introduced to strengthen the security and resilience of public telecom networks across the UK.
Today, cyber threats and risks are growing in scale and sophistication. The TSA aims to ensure that telecom infrastructure is not only robust but also agile enough to withstand and recover from attacks. It provides a unique opportunity for telecom providers to pivot from a siloed, asset-based and compliance-driven approach to a holistic resilience capability that meets regulatory requirements and delivers competitive advantage. Ofcom is the UK regulator responsible for enforcing compliance with TSA. However, it is important to stress that Ofcom’s role under the TSA is not simply about enforcement but about providing a guidance first framework to help providers build resilience in a proportionate way. Ofcom emphasizes that compliance should be achieved through collaboration, phased implementation, and practical guidance tailored to the maturity of each provider.
Key Takeaways
- The UK Telecommunications Security Act (TSA), in force since October 2022, requires telecom providers to move beyond perimeter-based defenses and embed resilience across network architecture, supply chain, and disaster recovery.
- Ofcom enforces TSA compliance through a guidance-first, phased approach. The Code of Practice is a living framework, not a rigid checklist, and is designed to evolve alongside emerging risks and technology.
- TSA Requirement 1.11 introduces an "assume breach" posture, mandating that providers operate as if systems are already compromised and implement real-time threat detection and containment accordingly.
- One of the most operationally complex TSA requirements is the assessment and removal of equipment from high-risk vendors, which may involve deep infrastructure changes for providers reliant on legacy technology.
- Providers who adapt effectively to TSA stand to gain a competitive advantage, as demonstrating robust security posture and network reliability becomes a differentiator in the UK telecoms market.
Key Provisions and Compliance Challenges
Key provisions of the TSA include new duties for providers to secure their networks against evolving threats. It introduces new oversight powers for Ofcom, enabling the regulator to enforce compliance and issue penalties. A Code of Practice (CoP) sets technical and operational standards, and Requirement 1.11 advises providers to ‘assume breaches’ have occurred and act as if systems are already compromised. However, the CoP is not meant to be a rigid checklist; rather, it is a living framework that evolves with risk and technology.
For telecom operators, the TSA establishes new requirements for accountability and strategic planning. It’s no longer sufficient to rely on perimeter defenses or siloed security tools. Providers must now embrace a holistic resilience strategy that spans network architecture, cybersecurity, supply chain integrity, and disaster recovery.
From a compliance perspective, providers must meet stringent security standards, many of which are detailed in the Telecommunications Security Code of Practice. This includes maintaining visibility and control, logging and reporting activity, and implementing mechanisms to detect and respond to threats in real time.
One of the most disruptive elements of TSA is the requirement to assess and potentially remove equipment from high-risk vendors. These can be established based on technical, geopolitical, and supply chain factors, with their equipment eventually being restricted from use within national networks – such as Huawei in the UK. This can be both costly and operationally complex, especially for providers with legacy infrastructure deeply intertwined with restricted technologies.
Enabling TSA-aligned Security
The TSA advises providers to use proactive security models and take measures to limit the impact of potential attacks. Organizations should possess the capability to promptly detect and address malicious instructions. This entails implementing network segmentation to effectively contain threats, as well as ensuring rapid recovery from security incidents.
This shift demands new tools with a new mindset, one that assumes compromise and builds resilience from the ground up. The good news is that providers who adapt swiftly and effectively to TSA requirements will likely gain a market edge. In a climate where trust and reliability are paramount, demonstrating robust security posture can be a powerful differentiator.
As UK providers adjust to these new regulations, A10 Networks is well-positioned to provide support. Known for its carrier-grade platforms, A10 offers a set of security and infrastructure solutions designed to enhance network resilience, visibility, and compliance. With a proven track record in helping providers scale IPv4, secure IPv6, and defend against volumetric DDoS attacks, A10 can help support TSA-aligned transformation.
A10’s key capabilities in supporting TSA compliance include:
- DDoS Protection: A10’s high-performance mitigation tools defend against both volumetric and application-layer attacks, which is critical for meeting TSA’s resilience standards.
- TLS/SSL Decryption: A10 solutions decrypt, inspect, and re-encrypt encrypted traffic, ensuring visibility into threats that hide within secure channels.
- Centralized Visibility and Automation: Unified control across hybrid environments allows for rapid containment and remediation, aligning with TSA’s emphasis on operational oversight.
- Secure Application Delivery: Advanced load balancing and traffic steering ensure that mission-critical services remain both available and secure.
- Web App and API Security: A10’s entity-based protection for all public API connections and traffic delivers increased visibility and proactive defense against evolving threats, aligning with the TSA’s broader requirements for securing networks and services.
- RBAC and Audit Trails: Role-based access control and detailed logging prevent lateral movement and support forensic investigations post-incident.
- Compliance Certifications: A10 devices hold certifications such as ISO 27001, FIPS, and Common Criteria, reinforcing their alignment with international security standards and TSA expectations.
Additionally, A10 supports secure software supply chains and embraces zero-trust architecture principles, helping providers address vendor risk and implement effective network segmentation.
A Turning point for Telecom Security
By integrating A10’s capabilities, providers can meet TSA requirements, while unlocking broader strategic advantages.
A10’s layered defense approach helps providers proactively reduce vulnerabilities and their risk exposure. With robust analytics, logging, and policy enforcement, A10 enables real-time threat detection and mitigation, ensuring both resilience and regulatory compliance, as well as giving providers deep operational visibility. Support for IPv6 and AI-ready hybrid cloud environments ensures that providers can evolve securely as infrastructure demands grow.
This positions them not just for compliance, but for long-term success as they future proof their environment in a rapidly changing digital ecosystem.
The criticality of the telecommunications industry necessitates rigorous security measures; the TSA marks a pivotal moment for UK telecom providers. It’s a call to action and one that demands strategic investment, operational transformation, and a shift in mindset. Those who embrace the challenge will not only meet regulatory expectations but also build networks that are secure, resilient, and trusted.
With partners like A10 Networks offering the tools and expertise to navigate this transition, UK providers are well-equipped to turn compliance into competitive advantage. In our modern digital landscape, telecom providers are the guardians of the grid, and their commitment to protecting critical national infrastructure is essential for a secure and connected future.
FAQs
The TSA is UK legislation that came into force in October 2022, establishing new legal duties for public telecom network providers to protect their infrastructure against cyber threats. It applies to all providers of public electronic communications networks and services operating in the UK, regardless of size.
Ofcom has the power to issue fines of up to 10% of a provider’s annual turnover for TSA non-compliance, with the ability to impose daily penalties for continued breaches. In severe cases, Ofcom can also issue directions requiring specific remedial actions within defined timeframes.
Rather than focusing solely on preventing attacks, the “assume breach” posture requires providers to design their networks as if a compromise has already occurred, implementing network segmentation, limiting lateral movement, ensuring rapid detection and isolation of threats, and maintaining the ability to recover critical services quickly.
TSA places significant emphasis on supply chain integrity, requiring providers to assess the security risk of all vendors and equipment in their networks. This includes evaluating geopolitical risk, restricting or removing equipment from designated high-risk vendors, and ensuring that third-party dependencies do not introduce vulnerabilities into critical national infrastructure.
Zero Trust principles align directly with TSA’s “assume breach” requirement by eliminating implicit trust within the network, enforcing strict identity verification, least-privilege access, micro-segmentation, and continuous monitoring. Implementing Zero Trust helps providers contain threats, reduce lateral movement, and demonstrate the operational resilience Ofcom expects under the TSA framework.
