The Korea Minting, Security Printing and ID Card Operating Corporation said personal information was exposed through unauthorized access to its Chak local-currency platform. As of November 14, the company had identified 3,083 affected customers, including 3,072 whose data exposure involved no more than two fields and 11 whose exposure involved three or four fields such as names, birth dates, phone numbers, account numbers, email addresses, CI information or encrypted card numbers.
The company detected unusual access, blocked suspicious IP addresses, restricted overseas connections and temporarily suspended the affected services before restoring them after emergency security measures. It reported the incident to relevant agencies and notified affected customers of the exposed fields and precautions against further harm.