On December 21, 2011, an unknown hacker released over 6 million accounts from one of the largest site for programmers in China, CSDN (short for China Software Developer Network), operated by Bailian Midami Digital Technology. Despite effort from CSDN users in using strong passwords, it is unfortunate that the database itself stored the user data including passwords in cleartext.

The news in English was first announced by The Hacker News but the leak may have been released a day earlier judging from comments posted on several Chinese sites. The release was made available via a Thunder link and alternative download link was also made available from a Chinese file sharing site, CTdisk, but the file has been removed since. The table below is the list of the leaked accounts with the passwords removed.

UPDATE (December 22, 2011): Six more Chinese sites are said to be hacked with their user data leaked following the CSDN leak. The sites include 7K7K (20M accounts), Duduniu (66K accounts), 178.com, Duowan, Mop (10M accounts) and Renren (5M accounts). These leaks are not shown in the table below.

What should you do?
Use the search box below to find out if your email is in the list. If yes, you are advised to change your password immediately if it is still in use elsewhere. For your privacy, do not enter your complete email in the search box. Try using the first part of your email instead, e.g. example instead of example@domain.com.

If you wish to have your entry removed from the list below, please send an empty email to disclosure@dazzlepod.com with subject "csdn removal request". The removal is done automatically within 24 hours if you use the same email as the one appeared in the list. This page may be cached for up to 24 hours.