Data theft: How do you know if your information has been exposed on the Dark Web?

In recent years, cases of data theft have increased dramatically, putting the privacy and security of millions of users at risk. Often, this information ends up for sale on the Dark Web, the hidden side of the internet where stolen data is traded. But how can you find out if your data has been compromised? In this article, we explain how to check and protect your information.

What is the Dark Web and how does data get there?

The Dark Web is a part of the internet not indexed by traditional search engines, accessible only with specific browsers, such as Tor. It is often associated with illegal activities, including the sale of:

• Login credentials (emails, passwords)
• Bank details (credit cards, accounts)
• Personal documents (ID cards, passports, social security numbers)

The data gets there through:

✅ Data breaches (hacks into companies like Facebook, LinkedIn, etc.)

Malware and phishing (fake emails that steal information)

Accidental leaks (poorly protected databases)

How to check if your data is on the Dark Web?

1. Use monitoring tools

Several services check whether your email or phone number appears in known breaches:

• Have I Been Pwned (free)
• Firefox Monitor
• Google Password Checkup (checks compromised passwords)

2. Monitor your credit card

Some banks and services like Revolut or PayPal alert you to suspicious transactions. Use apps like:

• Experian Dark Web Scan (for financial data)

3. Watch out for signs of fraud

If you start receiving

• Suspicious calls or SMS (phishing attempts)
• Password reset emails that you did not request
• Unauthorized bank transactions

It is possible that your data is being used.

What to do if your data has been exposed?

1️⃣ Change your passwords immediately

Use a password manager (Bitwarden, 1Password)

Enable two-factor authentication (2FA) on all accounts

2️⃣ Contact your bank

Block cards if there is a risk of fraud

3️⃣ Freezes your credit

Prevent criminals from opening accounts in your name

4️⃣ Report the incident

In Portugal, you can contact the CNPD (National Data Protection Commission)

How to prevent future leaks?

Use unique and strong passwords

✔ Activate 2FA whenever possible

Avoid sharing personal data on social networks

Be wary of suspicious emails and links

Conclusion

Data theft is a real threat, but with the right tools, you can find out if your information has been exposed and act quickly. Monitor your accounts regularly and adopt good security practices to reduce the risks.

If you suspect your data is on the Dark Web, don’t panic – take immediate action to protect your accounts and keep an eye out for suspicious activity. Prevention is the best defense!

🔒 Your digital security starts with awareness – protect yourself today!