Dueling Network Data Breach

What happened

In March 2017, the Flash game based on the Yu-Gi-Oh trading card game Dueling Network suffered a data breach. The site itself was taken offline in 2016 due to a cease-and-desist order but the forum remained online for another year. The data breach exposed usernames, IP and email addresses and passwords stored as MD5 hashes.

Exposed data

Recommended actions

• Change your Dueling Network password immediately, and update it anywhere you reused the same password.
• Enable two-factor authentication on the affected account and on your critical services (email, banking).
• Watch for targeted phishing emails referencing Dueling Network — attackers weaponise breach data quickly.
• Check whether your email address appears in this breach on haveibeenpwned.com.