Data Exfiltration Prevention for Government: Protecting Citizen Data and Critical Public Services

Why Government Holds Uniquely Sensitive Data

Local and central government organisations hold the most comprehensive datasets about citizens in existence. Council tax records, housing benefit claims, social care assessments, children's services case files, electoral registers, planning applications, and licensing records — often spanning decades. This data enables identity fraud, benefit fraud, and targeted attacks against vulnerable individuals. Social care and children's services data is among the most sensitive data any organisation holds, with exfiltration causing direct harm to vulnerable people. Nation-state actors target government systems for intelligence gathering and political destabilisation.

NCSC Guidance and PSN Compliance

The National Cyber Security Centre provides specific guidance for public sector organisations through the Cyber Assessment Framework (CAF) and sector-specific advisories. The Public Services Network (PSN) Code of Connection requires technical controls including data protection measures for any organisation connecting to PSN. The Government Cyber Security Strategy 2022-2030 sets targets for all government organisations to be resilient to known vulnerabilities and attack methods. Local authorities must additionally comply with the Local Government Cyber Assessment Framework. BlackFog addresses the data protection control requirements across all of these frameworks.

• NCSC Cyber Assessment Framework: data security objective requiring exfiltration prevention
• PSN Code of Connection: technical controls for data protection on government networks
• Government Cyber Security Strategy: resilience targets for all government organisations
• Local Government CAF: sector-specific cyber assessment and improvement framework
• UK GDPR: appropriate technical measures for citizen personal data
• Freedom of Information Act: protecting data from unauthorised disclosure

How BlackFog Protects Government Organisations

BlackFog deploys across all endpoints in government environments — officer workstations, social worker laptops, shared service centre terminals, and remote-working devices. It monitors all outbound data transfers in real time and blocks unauthorised exfiltration. When ransomware attempts to steal citizen records before encryption, BlackFog prevents the transfer. When a compromised account attempts to bulk-download housing benefit data, BlackFog stops it. The agent operates without impacting legacy systems common in government IT estates, and requires no network reconfiguration — critical for government environments where change management processes are lengthy.

• Prevents exfiltration of citizen records, social care data, and benefits information
• Blocks ransomware double-extortion targeting council and government databases
• Protects social workers and field staff using mobile devices
• Compatible with legacy Windows environments common in government IT estates
• No network reconfiguration required — deploys alongside existing government infrastructure
• Audit trail aligned to NCSC CAF and PSN compliance evidence requirements

Lessons from Recent Council Breaches

The pattern across Hackney, Redcar, Gloucester City Council, and other UK local authority breaches is consistent: attackers gain initial access through phishing or exposed remote access, move laterally through the network, exfiltrate sensitive data, and then deploy ransomware. In every case, the data exfiltration phase — which typically occurs days or weeks before encryption — was undetected. BlackFog addresses this critical gap by monitoring and blocking exfiltration in real time, regardless of how the attacker gained initial access. Even if an attacker breaches the network, citizen data cannot leave.

Frequently Asked Questions