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Communications Security Establishment Canada

@cse_cst

This account is not monitored 24/7 and does not act as a reporting platform. Suivez-nous en français : @CST_CSE

cse-cst.gc.ca/en
Joined April 2016
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ICYMI Our 2025-26 Annual Report is live. Real results for Canadians – from countering cyber threats to helping protect Canadians online. cse-cst.gc.ca/en/accountabil… #CyberSecurity
Shield with a digital map of Canada glowing against a dark background for Communications Security Establishment Canada's 2025-2026 annual report.

ALT Shield with a digital map of Canada glowing against a dark background for Communications Security Establishment Canada's 2025-2026 annual report.

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Cyber Month is ending, but the need to stay vigilant isn’t. Keep using strong passwords, updating devices, verifying requests and reporting concerns. Share these habits. Stay vigilant. Your best defence really is you. #GetCyberSafe #CyberMonth2026
Graphic with colorful padlocks surrounding text urging businesses to include protection in their plans, featuring GetCyberSafe.ca and Canada logos.

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Clicked a bad link or shared credentials by mistake? Don’t panic — act. Disconnect, change passwords and report it to your IT or security team. A fast response can limit the damage. #GetCyberSafe #CyberMonth2026 cyber.gc.ca/en/incident-mana…
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Looking for your next job opportunity? Our recruiters will be attending various upcoming career fairs. See where you can meet our recruiters: cse-cst.gc.ca/en/careers/rec…
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The Cyber Centre has issued an alert about critical vulnerabilities affecting PHP, a software widely used to run websites and online services. Organizations should apply available security updates immediately. Learn more and take action: cyber.gc.ca/en/alerts-adviso…
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A successful pilot. Strong partnerships. A permanent presence in Montréal. Since 2024, CSE has been strengthening its relationships with Quebec’s cyber security community to make its services more accessible. A strong regional collaboration strengthens Canada’s cyber resilience.
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Your phone, laptop and tablet hold more than you think. Turn on automatic updates, encryption, strong screen locks and remote wipe. The settings you choose can protect your data. #GetCyberSafe #CyberMonth2026
A woman and a man in a wheelchair both hold phones displaying checkmarks, promoting information protection for Week 3.

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#SmallBusinessweek recognizes the entrepreneurs and teams helping communities thrive. Protect what you've built: secure accounts, turn on updates, back up critical data and help employees spot cyber threats. Learn more → getcybersafe.gc.ca/en/resour…
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Protect your passwords and login information: - Use a different password for each account - Log off and sign out of accounts and websites when you are done using them For more best practices: cyber.gc.ca/en/guidance/best…
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Your accounts hold valuable information. Use a unique password for every account and enable MFA wherever it’s offered. These two simple choices can help stop many attacks before they start. #GetCyberSafe #CyberMonth2026
Smiling woman holding a phone with hand on chest, promoting peace of mind using a password manager on a green background with emojis.

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Attackers use email, calls, texts, social media and even in-person requests to create urgency and exploit trust. Pause before acting. Question the pressure. Verify through a trusted channel. #GetCyberSafe #CyberMonth2026 cyber.gc.ca/en/guidance/dont…
Older couple looking and pointing at a floating digital icon symbolizing cyber threats on a bright yellow background.

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It's Cyber Security Awareness Month. At CSE, protecting Canada’s digital landscape is part of our mission—but cyber security is a shared effort. This month, pause, verify and act. Your best defence is you. #GetCyberSafe #CyberMonth2026
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ALT Smiling woman points to herself against a colorful background. Text reads: Cyber Month 2026. Your best defence is you.

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Techies don’t just keep technology running, they help keep Canada secure. This Techies Day, we recognize the developers, analysts, defenders and problem-solvers working behind the scenes to strengthen cyber security. 💻🔐
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On National Day for Truth and Reconciliation, we honour residential school Survivors, remember those who never returned home, and recognize the strength of First Nations, Inuit and Métis Peoples. Reconciliation calls on us to listen, learn and act.
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Interested in a job at CSE? Meet CSE recruiters at upcoming career fairs and learn more about the people, skills and careers that support Canada’s national security. See where we’ll be: cse-cst.gc.ca/en/careers/rec…
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CSE’s longstanding partnership with the @CanadianForces is a key part of our history. Together, we bring unique strengths, expertise, and a shared commitment to protecting and serving Canadians. We’re proud of the people who make it possible every day.
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Do you know the main threats to your digital identity? They include: - Phishing - Social Engineering - Deepfakes - Third-party data breaches Protect yourself: cyber.gc.ca/en/guidance/prot…
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In today’s complex information environment, securing digital trust is essential. Public content provenance can help organizations build and gain that trust. Learn what public content provenance is and how to implement it: cyber.gc.ca/en/guidance/publ…
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ALT Digital blue check mark composed of glowing network nodes. Text reads: Securing trust in public digital content matters. Learn why.

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Looking for meaningful work? At CSE, employees take on real-world challenges that support Canada’s security. Learn more: cse-cst.gc.ca/en/careers
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ALT Exterior view of a CSE building. Text reads: Your future at CSE.

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This year we took action against 10 of the most significant ransomware groups harming Canada and our allies. Read more about how our foreign cyber operations disrupt threats before they reach Canadian systems in our Annual Report: cse-cst.gc.ca/en/accountabil…
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Today marks 25 years since the September 11 terrorist attacks. We remember the nearly 3,000 people who lost their lives, including 24 Canadians, honour the courage of first responders, and reflect on the resilience shown in the face of tragedy.
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