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

Bad Actor Uses Fake Android Chat to Install Malware

Researchers at CYFIRMA warn that the Bahamut threat actor is using a malicious Android app to deliver malware.

A Long-Running Credential Phishing Expedition

Researchers at Akamai describe a credential phishing campaign that’s been running since at least March 2022. Due to the volume of traffic to the phishing sites, the researchers estimate ...

Amazon Sends Email to Customers on Common Scam Tactics

We've reported on several Amazon scams, but for once, there is positive news. Amazon sent an email Thursday morning highlighting the top scams your users should watch out for:

CISA Discovers Spear Phishing and Valid Account Compromise Are the Most Common Attack Vectors

The US Cybersecurity and Infrastructure Security Agency (CISA) has found that compromise of valid accounts and spear phishing attacks were the two most common vectors of initial access in ...

Heads Up: Google Inactive Account Deletion Notifications

Google announced an update to their inactive account policies in May. Accounts that have been inactive for a period of two years or more will start being deleted in December 2023, at the ...

Researchers uncover surprising method to hack the guardrails of LLMs

Researchers from Carnegie Mellon University and the Center for A.I. Safety have discovered a new prompt injection method to override the guardrails of large language models (LLMs). These ...

Your KnowBe4 Fresh Content Updates from July 2023

Check out the 28 new pieces of training content added in July, alongside the always fresh content update highlights, events and new features.

SEC Implements New Rule Requiring Firms to Disclose Cybersecurity Breaches in 4 Days

What happened? The SEC (Securities and Exchange Commission) has introduced new rules that require public companies to be more transparent about their cybersecurity risks and any breaches ...

Facebook Scams Impersonate AI Tools

Fraudsters are spreading scams on Facebook that pose as ads for legitimate AI tools, according to researchers at Check Point. The Facebook pages impersonate ChatGPT, Google Bard, ...