Forget the technology: when it comes to security, here's a salutary reminder that it's the wetware that's the problem.
So there I was this morning, nipping down to out to get a pint of milk, when I hear someone reading out a string of numbers. I look round.
There's a man reading a string of numbers -- loudly -- off a credit card into a mobile phone. He's in the middle of a small shopping precinct, right next to a coffee shop within easy earshot of several people enjoying a morning coffee outdoors.
The man then proceeds to read the expiry date, helpfully preceded by the words: "And here's the expiry date", yada yada, followed by: "and the number on the back is 319", followed by his name. Spelt out slowly and carefully, just in case anyone should miss it.
You couldn't make it up...