Canada’s CSE expands cyber defence amid growing threats
AI and post-quantum cryptography are now central to Canada’s national cyber defence investments.
The Communications Security Establishment Canada (CSE) has published its 2025-2026 Annual Report, detailing the activities of the agency and the Canadian Centre for Cyber Security between April 2025 and March 2026 as cyber threats continued to grow in scale and complexity.
During the reporting period, the Canadian Centre for Cyber Security responded to more than 3,200 cybersecurity incidents affecting federal institutions and critical infrastructure. It also issued 25 alerts, 995 advisories and more than 97,000 notifications through the National Cyber Threat Notification System to 1,363 subscribed organisations.
CSE also took direct action against ten of the ransomware groups causing the greatest harm to Canada and its allies, while completing 1,772 supply chain risk assessments to strengthen cyber resilience across government. During the year, the agency received 13 ministerial authorisations, including four supporting foreign cyber operations.
The report highlights how recent defence investments are supporting work on secure digital infrastructure, stronger cyber defence capabilities, AI, post-quantum cryptography and deeper collaboration with trusted international partners.
Minister of National Defence David J. McGuinty said the report demonstrates the importance of CSE’s work to Canada’s security and economic well-being. Chief of CSE Caroline Xavier noted that the agency will mark its 80th anniversary in 2026 and said recent investments are providing the tools needed to address an increasingly complex threat environment.
Why does it matter?
The report illustrates how national cybersecurity agencies are shifting from responding to isolated incidents to maintaining continuous operations against increasingly sophisticated digital threats. Activities ranging from ransomware disruption to supply chain assessments demonstrate the expanding role of cyber defence in protecting governments and critical infrastructure.
The emphasis on AI, post-quantum cryptography and secure digital infrastructure also signals Canada’s long-term approach to cybersecurity. By investing in emerging technologies while strengthening cooperation with allies, CSE is preparing for a threat environment in which cyber resilience is closely tied to national security, economic stability and technological competitiveness.
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