The term “data breach” gets thrown around constantly in the news — but what does it actually mean, and why should you care? This guide breaks it down in plain English.
What is a Data Breach?
A data breach occurs when someone accesses, takes, or exposes information without authorisation. This could be a hacker breaking into a company’s database, an employee accidentally emailing sensitive files to the wrong person, or a misconfigured cloud server left open to the public internet.
What Kind of Data Gets Breached?
It depends on the organisation, but commonly exposed data includes:
- Email addresses and passwords
- Full names and dates of birth
- Physical addresses
- Phone numbers
- Medicare and health information
- Credit card and banking details
- Driver’s licence and passport numbers
- Tax file numbers (TFNs)
How Do Breaches Happen?
Hacking
Cybercriminals exploit vulnerabilities in software to gain unauthorised access to systems and databases.
Phishing
Employees are tricked into clicking malicious links or providing login credentials, giving attackers access to internal systems.
Insider Threats
A disgruntled employee or contractor deliberately leaks or steals data.
Accidental Exposure
Human error — a misconfigured database, an email sent to the wrong recipient, a USB drive left on a train.
What Happens to Breached Data?
Stolen data is typically sold on dark web marketplaces. Buyers use it for identity theft, financial fraud, targeted phishing, and account takeovers.
How Do You Know If You’ve Been Breached?
Often you don’t — until it’s too late. That’s why tools like DataGuard AU exist. By scanning your email against known breach databases, you can find out if your data has been exposed before criminals use it against you.
Check your exposure now — it’s free and takes 30 seconds.
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