The UK doesn't need this in the way that the US does. The UK moved over to secure "Chip and Pin" credit card processing in 2004 - ten years ago. In the US, you still sign pieces of paper when you use your credit card. For them secure credit cards are still a novelty.
Chip and pin isn't that much more secure. As for the lag in a switch over here in the USA that is due to the legal infrastructure around credit cards. Getting that signature is very important. It is interesting that Apple Pay is coming along and the banks a re agreeing to it security system and are apparently taking on the same responsibilities as are dictated by law for signed credit card transactions.
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Realize that part of the problem with .mac, MobileMe and Apple other cloud initiatives has been more in the concept not so much the software implementation. I need to point that out because the concept here looks really good.I'm a loyal apple fan, but I'm going to let the rest of the world beta test this for me. Recall how just plain wonderful and obvious the cloud sounded when Apple introduced .Mac? That had serious issues. They dumped that and tried again with MobileMe. Still had big issues. They dumped that and tried again with iCloud - and that still has issues even now... I'm not saying Apple are incompetent, just that they are often too aggressive rolling out immature software - in part because the whole thing was typically a too minimally tested super secret at launch time.
I get that somebody has to take the first step, and Apple is a fine leader, but we're talking about managing my money here so I'm going to enter conservative mode and watch this play out for a while.
On the other hand I agree completely with this idea. It is far better to watch how things unfold unless you have a throw away account to experiment with. It probably won't be more than a fe weeks before we know how reliable the service is. As a side note banks have a vested interest in reliable software systems, I'm expecting a high level of robustness and reliability. Banks can't afford to have software that screws up on a large scale.