Blizzard Entertainment’s internal network was breached, revealing scrambled passwords and email addresses. Hackers obtained email addresses for users located outside of China for Battle.net. Affected regions include North America, Latin America, Australia, New Zealand and Southeast Asia. No financial information such as credit cards, billing addresses, or real names were compromised, Blizzard’s co-founder and president wrote. Blizzard uses a “secure remote password” protocol to protect passwords, but advises North American customers to change their passwords.”]
Source: https://www.csoonline.com/article/2132125/blizzard-entertainment-warns-of-password-breach.html