Despite a rise in credit card cheat,the most commonly-used PIN is still 1234,with 1111 and 0000 coming in second and third.A study by Data Genetics has discovered that one in ten codes is so obvious it would take criminals just one attempt to guess it correctly,while more than a quarter of the codes are used so often they can be guessed in fewer than 20 attempts.The study from Data Genetics analysed Despite a rise in credit card cheat, the most commonly-used PIN is still 1234, with 1111 and 0000 coming in second and third. A study by Data Genetics has discovered that one in ten codes is so obvious it would take criminals just one attempt to guess it correctly, while more than a quarter of the codes are used so often they can be guessed in fewer than 20 attempts. The study from Data Genetics analyzed