Security Expert Explains Why Leaked Personal Data Cannot Be Taken Back

Cybersecurity expert Troy Hunt used a colorful comparison in his weekly update to explain a harsh truth about data breaches. He compared trying to remove leaked personal information from the internet to trying to remove urine from a swimming pool. Once it is out there, it spreads everywhere and cannot be retrieved. This reality applies to every data breach, no matter how quickly companies respond. This affects anyone who has ever had their information exposed in a breach. That includes email addresses, passwords, phone numbers, addresses, and more sensitive data like Social Security numbers or financial information.

If you have received a breach notification letter at any point in the past, your information is still circulating online. Criminals share, sell, and trade this data on hidden websites for years after the original breach.

What you should do depends on what type of information was exposed. First, if any breach involved passwords, change them immediately on the affected site and any other site where you used the same password. Second, start using unique passwords for every account. Password managers like Bitwarden, 1Password, or Dashlane can generate and store these for you. Third, enable two-factor authentication (also called 2FA or MFA) on every account that offers it, especially email, banking, and social media. This adds a second step to logging in, making it much harder for criminals to access your accounts even if they have your password. The long-term lesson is to assume your information will eventually be exposed. This is not pessimism; it is realistic planning. Focus on defenses that work even after a breach happens. Use different passwords everywhere so one breach does not compromise all your accounts. Use two-factor authentication as your safety net. Monitor your financial accounts regularly. Sign up for Have I Been Pwned (haveibeenpwned.com) to get alerts when your email address appears in new breaches. These habits protect you regardless of how many companies fail to protect your data.