KnowBe4 Blog

Keeping you informed. Keeping you aware.
Stay on top of the latest in human and agent security including social and prompt engineering, ransomware and phishing attacks.

Stu Sjouwerman

Founder and Executive Chairman

Stu Sjouwerman (pronounced “shower-man”) is the Founder and Executive Chairman of KnowBe4, Inc., which hosts the world’s most popular integrated security awareness training and simulated phishing platform, with over 54,000 organization customers and more than 50 million users. A serial entrepreneur and data security expert with 30 years in the IT industry, Stu was the co-founder of Inc. 500 company Sunbelt Software, a multiple award-winning anti-malware software company that was acquired in 2010.


Recent Posts

Government Workers as Phishing Targets

Government workers are prime targets for social engineering attacks, according to Kaitlyn Levinson at GCN. Attackers use different tactics to target government employees in specific ...

21% of federal agency passwords cracked in their security audit

Some excellent work here. An internal US Government agency audit showed that a fifth of passwords were easy to crack. Their recently published study showed that hashes for well over ...

Italian Cybercriminal Pleads Guilty to Phishing for Book Manuscripts

An Italian citizen named Filippo Bernardini has pleaded guilty in New York to stealing more than a thousand unpublished book manuscripts from various well-known authors. The targeted ...

The Good, the Bad and the Truth About Password Managers

We strongly recommend that you use a password manager to reduce password reuse and improve complexity, but you may be wondering if it’s really worth the risk. Is it safe to store all of ...

Phishing in the Service of Espionage

Reuters describes a cyberespionage campaign carried out by the hitherto little-known threat group researchers track as "Cold River." The group is circumstantially but convincingly linked ...

A Look Back at Mobile Government Cyberattacks Shows Increased Attacks and Weaker Security

A rise in the reliance on unmanaged mobile devices, matched with a lack of patching and increased attacks seeking solely to steal credentials was a perfect storm for government.

Ransomware and Fraudulent Funds Transfer are the Two Main Drivers of Cyber Loss

Representing more than half of all cyber loss, new data shows these attacks all begin with employees falling for social engineering, phishing, and business email compromise.

New Crypto Scam Targets Flipper Zero Buyers Impersonating Legitimate Shops

Interest in the handheld open-source multi-function cybersecurity tool by techies has risen to a new campaign seeking to steal crypto funds through illegitimate “sales” of the device.

Phishing Campaigns Impersonate the UK Government

The UK’s National Cyber Security Centre (NCSC) has outlined the top six most impersonated UK government agencies in 2022. The most impersonated entity was the National Health Service ...