Was I in the Tianya breach?
Tianya is a large Chinese online forum. Its breach happened in December 2011 and exposed 29,020,808 accounts. It included email addresses, names and usernames. If you had an account there by December 2011, check your address below to see whether it is one of them.
Breach record last updated . Steps read from the government pages at the foot of this page.
What happened?
Tianya, described as the biggest online forum in China, was hacked in December 2011. The attacker took tens of millions of user accounts. The leaked records held email addresses together with each member's name and username.
- Organisation
- Tianya, a large Chinese online forum (tianya.cn)
- When it happened
- December 2011
- Added to monitored breach databases
- 30 June 2016
- Accounts in the data
- 29,020,808
- What was exposed
- email addresses, names and usernames
What was exposed, and what does it mean for me?
- Your email addressemail addresses
Expect messages that look like they come from this service or another one you use, written to get you to click a link or sign in on a fake page.
- Other detailsnames and usernames
On their own these carry less risk, but they make a scam message sound more personal.
What should I do now?
In this order, for what this breach exposed.
1. Expect phishing
- Be wary of messages that urge you to act fast, ask for personal details, or link to an address that is slightly off.
- If a message might be genuine, do not use its links or phone numbers. Go to the site by typing its address yourself.
Is my address in it?
Enter your email address. We check that one address against monitored breach databases and show which breaches list it and what each exposed.
No account needed. We keep the address you check, when, and how many breach records it was found in, to prevent abuse, until you ask us to delete it. Privacy
Where does this come from?
- The breach record in monitored breach databases: dates, account count and what was exposed. What happened is in our own words.Read 14 October 2026
- CISA: Recognize and report phishingRead 14 October 2026
- Get Cyber Safe (Government of Canada): Fact sheet on phishingRead 14 October 2026