More trouble for Myki?

It appears researchers in London have cracked the Tube's new ticketing system.

At the heart of [the] card is the Mifare chip, made by Philips spin-off NXP.

Designed in the 1990s before processors of that size could handle strong encryption, Mifare has suffered at least three published cracks, according to security experts who have urged TfL to upgrade the system. (link)

Given that Melbourne's Myki is probably a very similar technology, could that mean all the money they've already spent on Myki is a waste?