What was the biggest data breach of 2025?

Change Healthcare affected 192.7 million people, making it the largest healthcare breach in U.S. history. In Europe, Free's breach exposed 19.2 million French customers. By raw record count, the Mars Hydro IoT exposure leaked 2.7 billion records — though these were device logs rather than personal identifiers.

How much does a data breach cost on average?

The global average is $4.44 million per breach in 2025, according to IBM. U.S. breaches average $10.22 million — a new record. Healthcare leads at $7.42 million per incident. These figures include detection, response, notification, and lost business costs.

Does encryption actually reduce data breach costs?

Yes. IBM's 2025 report found that extensive data encryption reduced breach costs by $208,000 per incident. More importantly, if attackers steal encrypted data they can't decrypt, the breach may not qualify as a "personal data breach" under GDPR — potentially avoiding regulatory fines entirely.

What percentage of data breaches involve human error?

The Verizon 2025 DBIR found that 60% of breaches involved the human element — credential misuse, phishing, social engineering, or configuration errors. The two largest breaches of 2025 (Change Healthcare and PowerSchool) both resulted from stolen credentials used on portals without multi-factor authentication.

Should companies pay ransomware demands?

The data says no. Ransomware payment rates hit an all-time low of 28% in 2025 (Chainalysis, 2026). PowerSchool paid $2.85 million and was re-extorted anyway. Median payments surged 368% to $59,556 — paying emboldens attackers without guaranteeing data deletion.

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