Researchers at Newcastle University in the UK have come up with a surprising way of attacking contactless payments.
Their paper is ominously entitled
Harvesting High Value Foreign Currency Transactions from EMV Contactless Credit Cards without the PIN.
It will be presented on Wednesday 05 November 2014 at the 21st ACM
Conference on Computer and Communications Security in Scottsdale, Arizona.
Very greatly simplified, it's a special sort of Man in the Middle (MitM) attack that could, at least in theory, be used to trick the owners of contactless payment cards into spending enormous sums of money without realising it.