Computer Security US Blog
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Threat Actor Tactics

Breaks down the techniques, tools, and procedures used by cybercriminals, nation-state hackers, and insider threats. Covers attack frameworks like MITRE ATT&CK and helps readers recognize and defend against evolving adversary behaviors.

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Security of Cyberspace

Security of Cyberspace: What Actually Works in 2026

In February 2024, Change Healthcare — one of the largest health payment processors in the United States — suffered a ransomware attack that disrupted pharmacy operations, delayed insurance claims, and exposed the protected health information of roughly 100 million people. One set of stolen credentials. No multi-factor authentication on a critical system.

Carl B. Johnson Feb 25, 2019 6 min read