Smart meters are transforming the energy landscape, shifting from simple consumption trackers to advanced, connected devices that enable real-time pricing, grid balancing, and data-driven decarbonisation.
Positioned at the edge of the energy network, these devices gather and store critical data that fuels digital transformation across the energy sector.
Yet while network security remains a priority, the local storage within meters often lacks equivalent protection, exposing a critical vulnerability in the energy system’s digital backbone.
Understanding the risk of unsecured data
Smart meters are designed to operate in the field for 15 to 20 years, continuously collecting, storing, and processing sensitive energy data in harsh and often unpredictable conditions. This data includes detailed energy consumption profiles, billing records, firmware logs, and grid event histories, information that, if accessed or manipulated, can have serious financial and operational consequences.
The risks to this embedded data are multifaceted. Attackers may physically tamper with meters to gain direct access to stored data or exploit software vulnerabilities to bypass authentication mechanisms remotely. Malicious actors could alter consumption logs to manipulate billing records or hide larger attacks on the grid infrastructure. In many cases, such breaches remain undetected until they manifest as inaccurate billing, forecasting errors, or disruptions to service, by which point the damage has already impacted revenue streams and customer trust.
Importantly, the continuous data writes and erases required for smart meters to function can wear down flash memory over time. Without robust, flash-aware storage management, this degradation can lead to silent data corruption, increasing the likelihood of errors in customer billing and compliance reporting. As the energy sector becomes increasingly data-driven, the implications of such inaccuracies grow, threatening the effectiveness of demand-side management, predictive maintenance, and decarbonisation initiatives.
With utilities and manufacturers under pressure to meet ESG targets and regulatory compliance standards, unsecured or mismanaged embedded data is a critical risk factor. The need to protect data at rest within smart meters is now central to ensuring operational resilience, maintaining financial stability, and safeguarding the reputation of utilities navigating the energy transition.
The business case for proactive security
Securing smart meters requires investment in expertise, systems, and processes, from maintaining dedicated cybersecurity teams to updating hardware for encryption compliance. Regulatory frameworks like the CRA are raising the stakes, requiring manufacturers to embed security at the design stage, manage vulnerabilities throughout the product lifecycle, and maintain rigorous documentation. This investment is crucial when considering the potential cost of an undetected cyberattack, which can escalate rapidly, far exceeding the upfront costs of embedding security.
The CRA: A catalyst for security-first design
The CRA will enforce secure-by-default practices for digital devices, making it clear that security must be embedded, not retrofitted. For manufacturers of smart meters, this means ensuring that devices are launched with no known vulnerabilities, support secure configurations, and include mechanisms for ongoing patching and updates. Compliance will be integral for maintaining market access and protecting customer trust as the digital energy ecosystem evolves.
In this new regulatory landscape, confidentiality, integrity, and authenticity are the foundations of secure device design. Confidentiality is achieved through encryption and secure data handling, protecting information from unauthorised access. Integrity ensures data accuracy, using secure boot processes and flash-aware file systems to guard against corruption during power loss or system failures. Authenticity is preserved through the use of digital signatures and secure updates, ensuring that only verified software and firmware can run on devices. By building these principles into smart meters, manufacturers can deliver devices that are prepared for the demands of the modern grid.
Building organisational resilience
To align with CRA and global security frameworks, manufacturers need to build organisational readiness, extending beyond devices to people and processes. This includes maintaining accurate Software Bills of Materials (SBOMs), conducting risk assessments, retaining test reports, and establishing incident response procedures. Staff training on cybersecurity, data retention management, and clear access controls form the basis of a resilient, secure organisational culture.
The rise of quantum computing presents a further challenge, requiring cryptographic agility in devices to prepare for a future where current encryption may no longer be sufficient. By building in the capability for over-the-air updates and supporting future cryptographic standards, manufacturers can future-proof their smart meters against evolving threats.
Utilities that have adopted flash-aware file systems and controllers have reported up to 50% longer device lifespans while maintaining data integrity, even across thousands of power interruptions. This approach not only reduces replacement costs and environmental impacts but also strengthens compliance and customer trust.
The competitive advantage of secure smart meters
Security is a market differentiator and not a ‘nice to have’. Embedded security reduces the risk of revenue loss, regulatory penalties, and customer churn while enhancing trust with utility partners and end users. As digital energy systems become more complex, manufacturers that prioritise built-in security will be best positioned to lead in a rapidly evolving market.
By embedding robust security into the architecture of smart meters today, manufacturers are not only complying with emerging regulations but also setting themselves apart as leaders in delivering reliable, secure, and future-ready solutions for the connected energy landscape.
About the Author
Katja Hakoneva is Product Manager at Tuxera. Tuxera is the leading provider of quality-assured data storage management software and networking technologies. We help people and businesses store and move data reliably, while making file transfers fast and content easily accessible. Our software is at the core of billions of phones, tablets, cars, TV sets, cameras, drones, external storage, routers, spacecraft, IoT devices, and public cloud storage platforms. Find out more at www.tuxera.com
