Data security in 2026: How to strengthen your defence strategy

20 April 2026 | 6 min read | Cybersecurity, Data Management for S/4HANA Migration, Decommissioning of Legacy Systems, SAP Data Archiving, SAP Data Management

Cybersecurity has become the number one strategic priority for businesses worldwide. According to several cybersecurity trends report, the chaotic rise of AI, geopolitical tensions, regulatory volatility, and an accelerating threat landscape are converging to create unprecedented challenges for security leaders.

In this environment, a reactive approach is no longer sufficient. Organisations must build proactive, layered defence strategies that address not just external threats but also the internal vulnerabilities created by poor data management practices, unarchived data, and legacy systems.

The threat landscape in 2026 has evolved dramatically. Adversarial AI is no longer a theoretical concern; it is actively being used to automate reconnaissance, craft highly convincing phishing campaigns, mutate malware in real time, and generate deepfake impersonations that target C-suite executives.

It is predicted that approximately 40% of enterprise applications will feature task-specific AI agents by 2026. This explosion of agentic AI is creating entirely new attack surfaces that traditional security measures were never designed to handle. Ransomware operations have evolved into sophisticated criminal enterprises, with generative AI deeply integrated into ransomware-as-a-service ecosystems. Additionally, supply chain attacks continue to rise as well.

Data is the primary target of most cyberattacks. Whether the objective is financial gain, espionage, or disruption, attackers are ultimately after your organisation’s data โ€” customer records, financial documents, intellectual property, and personally identifiable information (PII).

This is precisely why data security cannot be treated as a separate initiative from your broader cybersecurity strategy. Every gigabyte of data your organisation stores represents both value and risk. The more data you retain unnecessarily, the larger your attack surface becomes. Implementing robust data privacy practices and reducing data volumes through archiving are therefore essential security measures โ€” not just operational efficiencies.

One of the most overlooked yet highly effective cybersecurity strategies is SAP data archiving. While archiving is often discussed in the context of system performance and storage costs, its contribution to data security is equally significant.

SAP systems accumulate vast quantities of data over time. Much of this data like completed transactions, historical records, closed financial periods, and so on, are no longer needed for daily operations but remains in the live database. This creates an unnecessarily large attack surface. If a breach occurs, the volume of exposed data is directly proportional to the damage inflicted.

By implementing a structured SAP data archiving strategy, organisations can move inactive data out of the live system and into secure, controlled archive storage. This approach delivers multiple security benefits:

Reduced attack surface: Less data in the live system means less data at risk during a breach.

Improved access controls: Archived data can be protected with stricter access policies than operational data.

Enhanced compliance: Archiving supports retention management aligned with GDPR and other regulatory requirements.

Better monitoring: A leaner database is easier to monitor for anomalous behaviour.

There are compelling reasons to embrace regular data archiving in SAP, and cybersecurity resilience is firmly among them. Organisations that combine archiving with SAP Information Lifecycle Management (ILM) can automate data retention and destruction policies, ensuring that sensitive data is not kept longer than necessary โ€” a core principle of both data security and GDPR compliance.

Perhaps the most dangerous vulnerability in many organisations’ IT landscapes is one that remains behind the screens: legacy systems. These outdated platforms, which are often running unpatched software and lacking modern security features, represent a prime target for cybercriminals. As a matter of fact, unpatched systems are consistently one of the biggest challenges organisations face in securing their SAP infrastructure. With SAP ending mainstream maintenance for ECC by 2027, the risk posed by legacy systems will only intensify.

The consequences of neglecting legacy system security are severe. Legacy data can become a high cybersecurity risk because it may not be encrypted or protected by adequate access controls. There are compelling reasons to decommission legacy systems, and mitigating security risk is at the top of the list. The hidden costs of maintaining legacy systems extend well beyond licensing fees; they include the escalating cost of security incidents, regulatory fines, and reputational damage.

The solution is not simply to switch off old systems but to decommission them properly using dedicated tools. TJC Group’s Enterprise Legacy System Application (ELSA), built on SAP Business Technology Platform (BTP), enables organisations to safely retire legacy SAP and non-SAP systems while preserving full access to historical data. ELSA include features that ensure protection of sensitive information, preventing unauthorised users from viewing confidential data and reducing the risk of data leakage.

Artificial intelligence has fundamentally changed the cybersecurity equation. On the offensive side, approximately 83% of organisations reported experiencing an AI-driven cyberattack in the past year, with nearly 41% ranking adversarial generative AI as their top security concern.

AI-powered threats in 2026 include adaptive ransomware agents that modify their behaviour in real time to evade detection, AI-enabled voice cloning and deepfake technology used for vishing attacks, and automated vulnerability scanning that can produce functional exploits within 72 hours of a vulnerability disclosure.

However, AI is equally powerful as a defensive tool. Organisations should leverage AI-driven security solutions for:

Real-time threat detection: AI can analyse patterns across vast datasets to identify anomalous behaviour faster than human analysts.

Automated incident response: AI agents can contain threats and initiate response playbooks within seconds of detection.

Predictive analytics: Machine learning models can forecast emerging attack vectors based on threat intelligence data.

Vulnerability management: AI can prioritise patching efforts based on the actual risk each vulnerability poses to your specific environment.

The key is to ensure that your defensive AI capabilities keep pace with offensive AI developments. This requires continuous investment in security tools, threat intelligence, and staff training.

In 2026, the focus is shifting from pure protection to long-term cyber resilience. Resilience means accepting that breaches will occur and building the organisational capacity to detect, respond to, and recover from incidents with minimal business disruption.

Industry analysts identify five strategic pillars for a future-ready cybersecurity programme:

Governance and risk management: Integrate cybersecurity into board-level strategic decision-making. In 2026, 77% of boards have discussed the financial implications of cybersecurity incidents.

Layered defences: Deploy multiple overlapping security controls so that if one layer fails, others continue to protect critical assets.

Continuous threat exposure management: Move beyond periodic assessments to continuous, intelligence-led testing and monitoring.

Secure infrastructure design: Build security into your architecture from the outset, including keeping HANA database growth under control through proactive data volume management.

Cloud security architecture: As organisations migrate to S/4HANA and adopt cloud-first strategies, securing cloud environments with robust access controls, encryption, and monitoring becomes paramount.

Regulatory frameworks are increasingly converging with cybersecurity requirements. In 2026, global regulatory volatility is at an all-time high, with new legislation such as the UK Cyber Security and Resilience Bill broadening oversight to include managed service providers, data centres, cloud platforms, and AI providers.

Rather than viewing compliance as a burden, forward-thinking organisations are using it as a catalyst to strengthen their cybersecurity posture. GDPR compliance, for example, mandates data minimisation, purpose limitation, and secure processing – all principles that directly reduce cybersecurity risk when properly implemented.

SAP provides licence-free solutions for GDPR compliance within SAP systems, making it easier for organisations to implement data protection measures without additional licensing costs. Combined with automated archiving and ILM, these tools create a compliance framework that simultaneously strengthens data security.

Organisations operating across multiple jurisdictions must also navigate diverse tax, audit, and data residency requirements. Having a centralised data management strategy ensures that compliance efforts reinforce rather than fragment your security architecture.

Strengthening your cybersecurity defence strategy in 2026 requires a holistic approach that goes beyond traditional perimeter security. Here are the essential actions to prioritise:

Reduce your attack surface through SAP data archiving: Implement regular data archiving to move inactive data out of live systems, reducing the volume of data exposed in the event of a breach.

Decommission legacy systems urgently: Legacy platforms are among the most exploited entry points for attackers. Use dedicated solutions like TJC Group’s ELSA to retire obsolete systems safely while preserving data access.

Leverage AI for defence, not just offence: Deploy AI-driven threat detection, automated incident response, and predictive analytics to stay ahead of increasingly sophisticated attackers.

Align compliance with security: Use regulatory requirements such as GDPR and the EU AI Act as frameworks to strengthen your overall data security posture, rather than treating them as isolated obligations.

Cybersecurity in 2026 demands more than technology; it demands a strategic, data-centric approach that treats every piece of information as both an asset and a potential liability. TJC Group, with its 25+ years of expertise in data volume management and its ISO 27001 certification, help organisations build data management foundations that underpin a truly resilient cybersecurity strategy. Contact us today to discover how we can help you take control of your data landscape and strengthen your defences.