Correspondent

Dongwook Han 한동욱

Security correspondent

Dongwook Han writes about breaches and the boring facts of who got in. He would rather be late than wrong about attribution.

2 stories

Urban bank branch interior with glass doors, waiting chairs and an ATM alcove under flat ceiling fluorescents, rain-streaked sidewalk visible outside, no logos or readable text

Security

Shinhan Blocks Cryptocurrency Mule Accounts After Pig-Butchering Tip Surge

Shinhan Bank froze 12,400 cryptocurrency-linked accounts in August after pig-butchering tip volume tripled, routing suspicious on-ramps through joint FSS-Korean National Police Agency queues ahead of Chuseok remittance season.

Dongwook Han 한동욱 Sep 18, 2026South Korea

Data center aisle with blinking network switches and a technician at a laptop on a rolling cart under cool fluorescent light, cable trays overhead, scuffed floor tiles, no logos or readable text

Security

KISA Mandates Webhook Signing for Open-API Partners After Invoice Fraud

KISA will require HMAC-signed webhooks on certified open-API invoice feeds by March 2027 after a wave of forged tax-invoice callbacks drained SME accounts, giving fintech middleware vendors a nine-month retrofit window.

Dongwook Han 한동욱 Sep 18, 2026South Korea