Airports and seaports in South Korea are having their security beefed up.
Twenty-two fingerprint and face recognition scanning systems for foreign nationals are being installed before the G20 summit in November.
At Incheon International Airport, officials show how the new technology worked.
[Seok Dong-Hyon, Justice Ministry Official]:
"I believe this fingerprint scanning system can increase security, order, and social peace by denying entry to foreign nationals with dangerous elements such as criminals or terrorists."
This Wednesday, South Korea's Immigration service will start scanning fingerprints of foreign nationals suspected of terrorist acts or criminal activity.
Those suspected of trying to enter the country illegally may also have their faces scanned.
The Seoul Metropolitan government is placing an emphasis on providing "comfortable lodging," "convenient transportation" and "perfect security" for visitors coming to the G20 summit.