How to Stop Password Stuffing Attacks

Created with Meta.AI

With data breaches making headlines almost weekly, the reality is simple: if you’ve had an email address for more than a few years, your information has likely been exposed on the dark web. However, exposure doesn’t automatically make you a victim of identity theft. The real danger isn’t a high-tech cyber-attack; it’s automated "password stuffing."This is the practice of criminals taking leaked email-and-password combinations from old breaches and using software to test them against hundreds of other websites. If you reuse passwords, a minor breach at a random shopping site can instantly give a hacker access to your financial or tax accounts. Here's what you need to know:

Unfortunately, you can't pull your data back from criminal forums on the dark web, but you can completely control how useful that information is to a scammer. Here's what you need to do to protect yourself:

Lock Down Your Digital Identity. Start by entering your email address at HaveIBeenPwned.com, a free, trusted website that logs historical data breaches. If you pop up, don't panic, just change the password on that specific account. Keep in mind, unique passwords aren't enough. You must activate multi-factor authentication (MFA) on every online service you use, such as your email, financial and social media accounts. Your primary email should be your top priority; if a hacker breaks into your email, they can use the "Forgot Password" link on your bank or brokerage accounts to hijack your entire life. For the best protection, switch to passkeys wherever available. Companies like Google, Microsoft, Apple, Amazon, LinkedIn, and major banks offer this service. Passkeys replace traditional passwords entirely, using your device’s biometrics (face or fingerprint) to log you in. Because there is no text password stored on a company's server, there is nothing for a hacker to steal in a future breach.

Freeze Your Credit and Alert Your Bank. If you discover that sensitive information such as your Social Security number has been compromised, consider placing a credit freeze. You must contact all three major bureaus individually: Equifax, Experian, and TransUnion. By law, this is completely free. Unlike credit monitoring, which just alerts you after fraud occurs, a freeze locks your file so thieves cannot open new loans or credit cards in your name.

To protect your existing cash, turn on real-time transaction alerts via text or push notification in your banking apps for any expenditure over $0. This is especially critical for debit cards. If a criminal attempts an unauthorized charge, you’ll know within seconds and can block the card immediately.

Secure Your Phone Line. Breaches frequently expose phone numbers, putting you at risk for SIM-swapping. This happens when a hacker tricks your mobile carrier into routing your phone number to their device, allowing them to intercept the SMS security codes used for your accounts. Call your cellular provider and request a "Port Freeze" or set up a mandatory account PIN. Also, stop sharing your mobile number with everyone. In today's digital age, your mobile number should only be shared with close family and friends. Consider setting up Google Voice or Whatsapp as your public number. This will cut down on the amount of spam calls that come to your mobile phone.

Know What to Watch Out For. Once your data hits the dark web, it is there permanently. Beware of predatory services promising to "delete your data from the dark web" for a fee; it is technically impossible to force anonymous criminals to delete files. If you ever face active identity theft, head straight to IdentityTheft.gov, the FTC’s free, official recovery portal. Also, understand that if your information is on the dark web, this leaves you open to a wide range of AI-powered scam Emails, text messages, and phone calls. In today's digital world, adopt a "Zero Trust" mentality for these forms of communication. If it looks fishy, don't respond; throw it away.

You cannot control whether a corporation guards your data properly, so protecting yourself and building your human firewall as best as you can will encourage hackers to go after easier targets.

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About Burton Kelso. Burton Kelso is an internationally recognized 2x TEDx Technology Keynote Speaker and Consumer/Small Business Tech Expert dedicated to making the complexities of the digital world accessible and secure. With over 30 years of experience in the trenches of cybersecurity, digital marketing, and AI ethics, Burton has become a trusted voice for organizations seeking to navigate the rapidly evolving tech landscape. As a high-energy corporate trainer and event speaker, Burton specializes in translating "geek speak" into actionable strategies for leadership teams, small business owners, and everyday consumers. He is a frequent media contributor, providing expert commentary on national and global news outlets regarding AI safety, digital wellness, and cyber-threat mitigation.

Whether he is delivering a virtual workshop or a mainstage keynote, Burton’s mission is to empower audiences to use technology as a tool for growth—not a source of stress.

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