If you follow security news, you’ve likely heard people talking about big companies suffering data breaches. And you might worry about how these breaches can affect you as a user. So what is a data breach? That’s what we’ll explain below, with advice on how to protect yourself from future breaches. Security Incident, Security Breach, Data Breach: What’s the Difference? The general term for a company or organization being hacked or attacked digitally is a security incident.