Thu Nov 26, 2015 3:54 am

Two major flaws with American Express cards: replacement card details are bases on old card details (auch!) and the new chip terminals can be fooled by changing a single bit on the magnetic stripe (really?!? Oh come on!)Oh and this hacker created a nice coin sized device. I'm sure it does nothing serious.Incredible.Fortunately for the bad guys, they can now calculate all replacement card details from old hacked databases.Oh well... all they need to do is replace all cards and all terminals