SEC595: Applied Data Science and AI/Machine Learning for Cybersecurity Professionals


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Maria always tried to stay safe online, but the endless advice left her feeling overwhelmed. She had heard she needed strong passwords, antivirus software, VPNs, firewalls, privacy settings, backups, and more. Unsurewhere to start, she began by adjusting some of the technical settings on her Wi-Fi router but quickly became confused and eventually gave up.
Later that day, Maria received an urgent text message that looked like it came from her bank. It warned thather account would be locked unless she confirmed her login immediately. Stressed and distracted, she clicked the link and entered her username and password. Within hours, cybercriminals were inside her bank account. Because she reused the same password for some of her other accounts—email, shopping sites, and even social media—they quickly gained access to much of her entire digital life.
Maria didn’t fall victim because she didn’t care—she fell victim because she didn’t know where to start.
A major challenge for many people is overcoming this sense of confusion. That’s why the NationalCybersecurity Alliance (NCA) created the Core Four—a set of four simple yet powerful steps anyone can follow. By focusing on these four actions, you can put your energy where it matters most.
Your passwords are the keys to your digital life. Unfortunately, cybercriminals are constantly trying to steal orguess them. If you reuse the same password across multiple accounts, one stolen password could unlockeverything.
Here’s how the Core Four approach simplifies this:
Even the strongest password isn’t perfect. That’s where multi-factor authentication (MFA) comes in. Also known as two-factor authentication or two-step verification, MFA adds an extra layer of security by requiring something in addition to your password—such as a code sent to your phone, a fingerprint, or a security key.
Why does this matter? If a cybercriminal steals your password, they still can’t access your account without the second factor. Turn on MFA wherever possible, especially for your most important accounts.
Cybercriminals are always looking for weaknesses in software and apps. When companies discover these flaws, they release updates to fix them. If you delay installing updates, you leave the door open for attackers to exploitknown vulnerabilities. The easiest solution is to enable automatic updating on your devices, apps, andaccounts. This ensures security fixes are applied in the background, often without you lifting a finger.
Cybercriminals don’t always need technical tricks—they often rely on manipulating people. This tactic is called social engineering, and it includes like phishing emails, fake text messages, and phone calls designed to trickyou into clicking links, downloading malware, or sharing your credit card information or password.
Here are some red flags to watch for:
When in doubt: stop, slow down, and verify.
Security doesn’t have to be complicated. By focusing on the Core Four, you can build online habits that actually stick. Whether it’s your coworkers, kids, parents, or community, the Core Four offers a simple yet powerfulway to help everyone stay safer online.
Want to go beyond the newsletter? Tune in to the new OUCH! Podcast, where we go deeper on cybersecurity topics and give you extra insights to stay ahead of the threats.


Jennifer Cook is the Senior Director of Marketing at the National Cybersecurity Alliance.
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