Adding to the list of new-fangled payment options, currently encompassing all from phones to fingerprints, the South Koreans have just got another choice.

The new system being launched by Shinhan Card and Visa is incorporated into a USB flash drive and lets users pay for online purchases by putting the drive into their computers' USB ports and letting the device automatically provide their credit card details.

In store systems are also being developed that will let users pay in the same way whilst out and about.