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

[Policy Template] Should Failing Phishing Tests Be A Fireable Offense?

Firing employees for failing phishing tests can be extremely counterproductive and can damage an organization’s overall security posture. That, at any rate, is what two security experts ...

"Delete" Notification as Office 365 Phishbait

Attackers are posing as Office 365 support in phishing emails that warn users about an “unusual volume of file deletion” on their accounts, BleepingComputer has found. The emails claim ...

A Case of Password Spraying

Citrix last month confirmed the FBI’s suspicions that hackers had used a technique known as “password spraying” to compromise the company’s networks before stealing a massive amount of ...

Impersonation Phishing Attacks Up 67% in Last 12 Months

Social engineering attacks using impersonation tactics increased by 67% over the past twelve months, according to Mimecast’s annual State of Email Security report. Mimecast surveyed more ...

KnowBe4 Is UK's Security Training And Consultancy Provider Of The Year

We're extremely pleased to have won UK's prestigious Network Computing Security Training And Consultancy Provider Of The Year.

Why KnowBe4 Is The Only True Global Security Awareness Training Vendor

Security awareness, by its very nature, relies on communication. And that communication, in turn, relies on clarity so that it can be fully understood and applied by the learner. To be ...

Red Flags Warn of Social Engineering

The easiest way to avoid falling for scams and other social engineering attacks is to have an understanding of the tactics employed by attackers, according to Roger A. Grimes, writing in ...

Phishing Canadian Targets

We have recently blogged about KrebsOnSecurity's story on compromised Canadian business email addresses. Here is some updated background on threats to Canadian organizations.

A Single Tweet Saw One Woman's Bank Account Entirely Wiped Out

Dean Dunham at The Mirror in the UK reported: "Social media is often disgruntled customers first port of call when they want to make a complaint about goods or services these days, but ...