Skip to main content

Data Breach

Definition

A data breach is a security incident in which confidential, protected, or sensitive data is exposed to unauthorized parties. Data breaches can result from a cyberattack, human error, or system failure.

Under GDPR, data breaches with risk to individuals must be reported within 72 hours to the supervisory authority. Fines can reach up to 4% of global annual turnover.

The average cost of a data breach was $4.88 million in 2024 (IBM Cost of Data Breach Report).

Related terms

GDPR Incident Response Encryption