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

Duolingo Users Should Be on the Lookout for Targeted Phishing Attacks

Users of the language learning app Duolingo should be wary of targeted phishing attacks following a recent data leak, according to Anthony Spadafora at Tom’s Guide. Criminals scraped the ...

Data Breaches Involving Social Engineering Attacks Take Longer to Identify and Contain

Continuing coverage of IBM’s recently-released Cost of a Data Breach report, we focus on the impact attacks involving social engineering have on data breach costs.

Ransomware Attacks Rise 69% and 1500 Organizations Feel the Hurt

A new report from Rapid7 has found that the number of ransomware attacks increased by 69% in the first half of 2023. Rapid7 incident response data found that at least 1500 organizations ...

LinkedIn Deception: How a Chinese Spy Tricked Thousands of UK Officials

In last few years, cyber espionage has taken a new form. A recent investigation by The Times has unveiled a Chinese intelligence officer's extensive use of LinkedIn to target UK ...

Phishing Tops the List as the Most Costly Initial Attack Vector in Data Breaches

After you come to grips with the massive average cost of a data breach to an enterprise organization measured in the millions, it’s time to look at the factors that increase – and lower – ...

Data Breach Costs in Healthcare Rise 53% to More than Double the Average

It appears that one of the most regulated industries also holds the title for the highest average data breach costs – coming in at just under $11 million per breach.

Deceptive Links, Brand Impersonation, and Identity Deception Top the List of Phishing Attack Tactics

As phishing attacks continue to dominate as an initial attack vector, new data shows that attackers maintain the use of tried-and-true techniques as the means to successful attacks.

Phishing Campaigns Targeting Microsoft Login Credentials Jump an Unprecedented 6100%

Monitoring of traffic to phishing pages hosted on the free hosting service Cloudflare R2 show an unheard of spike of 6100%, many going undetected by many security solutions due to the ...

Scammers Impersonate the Australian Tax Office

The Australian Taxation Office (ATO) has warned of an increase in SMS and email phishing attacks targeting taxpayers, News.com.au reports. The scams attempt to steal credentials or ...