Computer Security US Blog

Computer Security News and Insights

Computer Virus Prevention

Computer Virus Prevention: 9 Steps That Actually Work

A Single Click Cost One Hospital $28 Million In 2024, Change Healthcare — a unit of UnitedHealth Group — suffered a ransomware attack that started with compromised credentials and insufficient access controls. The fallout disrupted healthcare claims across the United States for weeks. The company paid a $22 million ransom, and total

Carl B. Johnson Jun 04, 2026 5 min read
Zero Trust

What Is Zero Trust? A Security Model That Actually Works

In 2020, threat actors compromised SolarWinds' Orion software and used it to breach dozens of U.S. government agencies. The attackers moved laterally through networks for months because once they were inside the perimeter, those networks trusted them. That single breach rewrote how the federal government thinks about network

Carl B. Johnson Jun 03, 2026 5 min read
Fake Email

Fake Email: How to Spot, Stop, and Survive One

A Single Fake Email Cost Facebook and Google $100 Million Between 2013 and 2015, a Lithuanian man named Evaldas Rimasauskas sent a series of fake email messages to employees at Facebook and Google. He impersonated a legitimate hardware vendor, attached fraudulent invoices, and directed payments to bank accounts he controlled.

Carl B. Johnson Jun 03, 2026 6 min read
Spear Phishing

Spear Phishing: Why Targeted Attacks Bypass Your Defenses

In January 2024, a finance employee at a multinational engineering firm in Hong Kong wired $25 million to threat actors after a video call with what appeared to be the company's CFO. The call was a deepfake. But the attack started weeks earlier — with a single spear phishing

Carl B. Johnson Jun 02, 2026 5 min read
Man in the Middle Attack

Man in the Middle Attack: How Hackers Steal Data

In 2019, a Lithuanian national named Evaldas Rimasauskas pleaded guilty to stealing over $120 million from Google and Facebook using a sophisticated man in the middle attack scheme. He impersonated a legitimate hardware vendor, intercepted invoice communications, and redirected payments to bank accounts he controlled. The scheme ran for two

Carl B. Johnson Jun 02, 2026 5 min read
Cybersecurity Training

How to Train Employees on Cybersecurity in 2026

The Breach That Started With a Single Click In 2023, MGM Resorts lost an estimated $100 million after a threat actor called Scattered Spider social-engineered a help desk employee with a ten-minute phone call. The attacker didn't exploit a zero-day vulnerability. They didn't crack an encryption

Carl B. Johnson Jun 01, 2026 5 min read
Strong Passwords

Strong Password Examples That Actually Stop Hackers

The 6-Character Password That Cost a Company $4.88 Million IBM's 2024 Cost of a Data Breach Report pegged the global average breach cost at $4.88 million. In my experience analyzing post-breach forensics, weak or reused passwords remain the single most common entry point for threat actors.

Carl B. Johnson May 31, 2026 5 min read
Shadow IT

What Is Shadow IT? The Hidden Risk You Can't Ignore

In 2023, a financial services employee signed up for an unsanctioned file-sharing app using their corporate email. Within weeks, a threat actor exploited a vulnerability in that app and exfiltrated 11,000 customer records. The security team didn't even know the app existed. That's shadow IT

Carl B. Johnson May 30, 2026 5 min read