In the UK there has been a large increase recently in the use of contactless card payments (you pay by waving your card over a reader). Prior to this the primary way to pay with a card was to use "chip and PIN" where you insert your card into a machine and enter your PIN.
The banks and card issuers claim the contactless method is more secure than chip and PIN but I am struggling to see how this can be true.
Visa appear to just gloss over the security measures in place:
How secure is a Visa contactless payment?
Very secure indeed, and certainly much more secure than carrying cash. Visa contactless cards use the same secure technology as Chip and PIN so you can feel totally confident when you’re using it to pay. Source
There is no second factor authentication (PIN entry) when paying. If I have someone else's card I can pay, up to a transaction limit of £20, ten times a day.
I have also had the ultra paranoid thought that someone could modify the the Kimble tag sensors around the door and read your card automatically as you leave the store. That is probably pure science fiction though.
My question is: How can contactless payment be more secure than Chip and PIN?