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

Phishing Sites Increase by 30% in the First Quarter of 2019 Putting SaaS and Webmail at Risk

Cybercriminals seem to be increasing their efforts in quantity, frequency, and obfuscation, according to the latest data from the international cybercrime coalition, the Anti-Phishing ...

Beazley Insurance Breach Insights: "Ransomware Attacks Skyrocket"

Ransomware attacks skyrocketed in the first quarter of 2019, according to the Beazley Breach Response (BBR) Services team, which reports a 105% increase in the number of ransomware attack ...

“Monster” Data Breaches Result in an Average Cost of $347 Million

Data breaches in the hundreds of millions of records have made the news over the last two years. The latest report from Bitglass covers the results and repercussions of the breaches.

Over 10 Million People Hit In Single Australian Data Breach

The Office of the Australian Information Commissioner's (OAIC) quarterly data breach report also revealed private health was again the country's most affected sector.

UK Says It Warned 16 Nato Allies Of Russian Hacking Activities

The UK has shared information on Russian hacking attacks with 16 NATO allies over the last 18 months, a British government official said today. "I can disclose that in the last 18 months, ...

72 Percent Of Cyber Security Professionals Have Considered Quitting Over Lack Of Resources

Ian Barker at Betanews commented on something astounding.

[Heads-up] Scary Phishing Attack Uses Legal Threats From Law Firm

Brian Krebs just posted the following alert: "Some of the most convincing email phishing and malware attacks come disguised as nastygrams from a law firm. Such scams typically notify the ...

Employees Don’t Take USB Security Seriously, Putting Organizations at Risk

USB devices continue to be a necessity for employees, an entry point for attackers, and an insecure medium to connect the two, spelling trouble for organizations.

U.S. Department of Homeland Security Issues List of Office 365 Security Vulnerabilities and Best Practices

The latest Analysis Report covers both areas of concern around Office 365 configurations that impact security, and offers up some simple recommendations to shore up vulnerabilities.

Q1 2019 Top-Clicked Phishing Email Subjects from KnowBe4 [INFOGRAPHIC]

Every quarter, KnowBe4 reports on the top-clicked phishing emails by subject lines in three categories: Social, General, and 'In the Wild'. The latter category results come from the ...