You've probably heard the term "data breach," but do you really understand what it is? Read on to learn what a data breach involves and practical steps you can take to reduce your risk.
Data breach defined
A data breach, data leak, or data spill is an incident in which protected, sensitive, or confidential information is viewed, used, or stolen by someone who is not authorized to access it.
- Personally identifiable information (PII) such as addresses, dates of birth, or Social Security numbers
- Personal health information (PHI) like medical histories, lab results, or insurance details
- Intellectual property
- Trade secrets and proprietary business information
How does a data breach occur?
Data breaches can affect individuals and organizations and happen in many ways. Understanding common vectors helps you take protective steps.
- Thieves intercept unencrypted data in transit.
- Hackers exploit weak or unsecured networks to access files.
- Insiders with access sell or misuse personal information.
- Lost or stolen laptops, smartphones, or storage devices expose data.
- Submitting data on unsecured websites or public Wi‑Fi networks.
- Phishing schemes that trick people into revealing credentials or sensitive data.
- Posting sensitive details on social media.
- Theft of physical files or hard copies.
- Hidden cameras or observation capture credential entry.
What happens after a data breach?
When your information is exposed, the consequences can be immediate and long lasting.
- Criminals can access bank or credit card accounts.
- Someone could impersonate you to open new credit accounts or apply for loans.
- A thief could access your work account and steal confidential company information.
Protection from a data breach
Laws and industry standards—such as HIPAA for health records and PCI requirements for payment data—help regulate how organizations handle personal information, but they are not a substitute for personal precautions.
Use these practical steps to reduce your risk:
- Secure devices with strong passwords or biometric locks.
- Use unique, complex passwords for each account and enable multi-factor authentication when available.
- Encrypt sensitive personal and work data at rest and in transit.
- Share credit card or personal data only on secure sites (look for HTTPS).
- Do not open links or attachments from untrusted sources.
- Keep software and devices up to date with security patches.
- Consider subscribing to a breach monitoring service.
- Maintain backups of important data stored separately from your main device.
If you want formal protection against the costs and liabilities from a breach, consider Data Breach (Cyber Liability) Insurance to learn what coverage options are available.
To compare policy types and limits, review Data Breach Insurance (Cyber Liability Insurance) for details that may apply to your situation.
For help evaluating options or filing a claim, talk to an agent.
Frequently Asked Questions
What is a data breach?
A data breach is when protected or confidential information is accessed, used, or disclosed without authorization.
How can I check if my information was involved in a breach?
Use reputable breach notification or monitoring services and check direct notices from companies where you have accounts.
What should I do immediately after learning my data was breached?
Change passwords, enable multi-factor authentication, contact financial institutions, and monitor accounts for suspicious activity.
Can insurance help after a data breach?
Certain cyber liability policies can help cover notification costs, credit monitoring, and some liabilities, depending on the policy terms.