Jeff Chandler

Jeff Chandler is a trusted voice in cybersecurity, often invited to share his insights on podcasts, local news, and industry publications. As the Founder and CEO of Z-JAK Technologies, he leads a Louisville-based Managed IT Services Provider that helps small and mid-sized businesses stay secure, compliant, and future-ready in an increasingly risky digital world. At Z-JAK, Jeff and his team deliver cybersecurity-first, white-glove IT support to industries such as manufacturing, professional services, and law firms throughout the Louisville metro region. His philosophy is simple: protect businesses today while preparing them to thrive tomorrow. With over 40 years of experience as a developer, systems architect, business consultant, and insurance executive, Jeff brings a rare blend of technical expertise and business leadership. He previously served as Chief Technology Officer for Jefferson National Financial, where he was part of the startup team that built the company from the ground up and played key roles in its growth and success. Today, Jeff combines his deep technical knowledge with his passion for helping businesses succeed, guiding leaders to adopt technology and AI strategies securely, effectively, and with confidence.

The Phishing Attack That Walks Right Through Your MFA

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TL;DR: Adversary-in-the-middle (AiTM) attacks let criminals hijack a logged-in account even when multi-factor authentication is turned on. The attacker sits between you and the real login page, waits for you to sign in, then steals the session token that proves you did. The fix isn’t more MFA. It’s phishing-resistant MFA, tighter access rules, and watching

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Beyond MFA: How to Protect Active Login Sessions in 2026

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Key Takeaways: Multi-factor authentication is one of the best security upgrades a small business can make, but attackers have found ways to go around it without ever touching your password. Session hijacking lets them steal proof that you’re already logged in and reuse it to access your accounts, cloud apps, and business data without triggering

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Why Browser Extensions Are a Hidden Business Security Risk

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Browser extensions feel small, but they sit inside the most sensitive part of modern work: the browser tab where your team runs everything. A single over-permissioned or compromised extension can access your cloud apps, capture form data, and read page content without triggering a single security alert. This post explains why extensions are a serious

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LinkedIn Job Scams Are Targeting Your Employees Right Now

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LinkedIn recruitment scams are one of the most effective social engineering attacks targeting small businesses today. They look like normal professional outreach, borrow credibility from real brands, and guide employees toward one small action at a time until real damage is done. This post explains how the scam works, what red flags to teach your

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Remote Work Security: The Physical Risks No One Talks About

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Your home office is now part of your business’s security perimeter, and physical risks have become digital ones. An unlocked screen, an old router, or an unattended laptop can give someone access to your cloud apps, client data, and financial tools without needing to “hack” anything. This post walks through the physical-to-digital security gaps most

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Company Laptop at Home? Here’s How to Keep It Secure.

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Remote work has permanently changed the security landscape for small businesses. According to IBM, data breaches involving remote work cost an average of $173,000 more than those that don’t. The good news is that most of the risk comes from a handful of simple, fixable habits. This checklist covers the practical steps every remote employee

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Your Employees Are Using Apps You Don’t Know About. Now What?

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Most small businesses are running far more cloud apps than they realize, and most of those apps haven’t been reviewed, approved, or secured. Research shows 64% of employees admit to using unsanctioned SaaS applications for work. That’s not a minor IT headache. It’s a data governance problem, a compliance exposure, and in many cases, an

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