Japan Post security incident history
Hacking, data breaches and other security incidents involving Japan Post, with related coverage.
Incidents: 1 · Most recent
Dentsu Digital breach shuts down Japan Post’s LINE service
↳ Knock-on damage from the Dentsu Digital incident · View original incidentImpact: Suspension of the official LINE service and possible leak of user information
Japan Post’s official LINE service was suspended after TONARIWA, Dentsu Digital’s LINE account management platform, was compromised. The attacker used leaked administrator account credentials to gain unauthorized access and then escalated privileges. An investigation is examining whether Japan Post users’ personal information and LINE account-linking authentication information may have been leaked.
Related reports: 5 →