This updated article (originally published September 12, 2019) guides you through the steps to take if you suspect an online account compromise. Acting swiftly is crucial to minimize potential damage.

Confirming a Hack

With frequent data breaches reported, vigilance is key. Stay informed by following reputable tech news sources (like this one!) on platforms such as Twitter or RSS. Consider setting up Google Alerts for hacks affecting your key accounts.

If a breach affecting your accounts is reported, use Have I Been Pwned? This website aggregates leaked credentials from various data breaches, listing billions of compromised accounts. Entering your email address reveals if your information is associated with any breaches. A match doesn't guarantee exposure, but it signals potential compromise. Sign up for future alerts.

Also, check your email for breach notifications directly from affected apps and sites. Ensure your contact details are accurate and that emails aren't ending up in your spam folder. These notifications often include recovery instructions, sometimes even preemptively resetting your password.

Detecting Unusual Activity

Most platforms provide account activity logs. Suspicious activity, like logins from unfamiliar locations, warrants investigation.

• Gmail: At the bottom of your inbox, click "Details" to view recent activity, including app and location details.
• Facebook: Access the passwords and security settings, then "See more" under "Where You're Logged In" to review login times, devices, and locations.
• Twitter: Go to settings and privacy, then "Security and account access," "Apps and sessions," and "Sessions" to see active sessions and connected apps.
• Instagram: Check recent login activity through the dedicated page in your settings.

Regularly (e.g., weekly) reviewing this activity significantly improves early detection of unauthorized access.

Securing Your Accounts

If a breach is confirmed, immediately remove unauthorized access. Most platforms allow logging out of all active sessions except your current one. On Facebook, flag unrecognized logins and remotely log out devices using the three-dot menu.

Next, change your password immediately. Choose a strong, unique password—different from those used on other accounts. A password manager can assist if remembering passwords is challenging. Enable two-factor authentication for enhanced security.

If locked out, contact the platform's support team. Provide verification details (security questions, account age, devices used, location) to regain access. Account recovery isn't automated and can take time. While waiting, change passwords on other accounts where you've used the same credentials to prevent further compromise. Never reuse passwords; unique passwords are essential for robust security.

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