💥 Breach Timeline
The biggest data breaches in history — what was stolen, how it happened, and why it still matters. Click any breach to read the full story.
Showing 18 of 18 breaches · Ordered newest first
Frequently asked questions
How do I know if I was affected by one of these breaches?▼
Check haveibeenpwned.com with your email address. It cross-references known breaches, including most of the ones in this timeline, and tells you exactly which ones included your data.
Why do some breaches take years to become public?▼
Companies sometimes don't detect an intrusion right away, and disclosure laws and investigations can delay public confirmation. Some breaches on this timeline were discovered by researchers or journalists well after the initial theft.
What's the single most useful thing I can do after a breach?▼
Change the password on the breached account and anywhere you reused it, then turn on two-factor authentication. That one habit blocks most of the damage from stolen credentials.