What is Chip and PIN?
Tuesday, June 9th, 2009Chip and PIN is something we have all heard of, but I wonder how many of us really know what it is, how it works and why it is meant to be better than the old method of signing for your purchases. For your convenience, I shall outline the subject now:
Chip and PIN is the implementation of the EMV (Europay, Mastercard and Visa) standard for secure payments, designed to make transactions more secure and reduce credit card fraud. It involves embedding tiny microchips into credit and debits cards, which are automatically authentically using a PIN security number. By inserting the card into a credit card terminal, a customer has to insert the correct PIN number to authenticate the payment. If a customer does not know their PIN number, the verification fails and the transaction does not go ahead; making the system secure, yet also very swift and simple.
Until it was introduced, all credit and debit card transactions required a signature for verification after the account data was read off the magnetic strip or an imprint was made of the raised text of the card. The problem with this system was that people could easily steal cards from people and forge a signature, or steal cards from the post, write their own signature on the card and go about using it as if it was their own. More advanced methods of card fraud involved technology that was used to clone cards by reading the magnetic data from one magnetic slip and writing it to another. With the new system, another person may have your card but, without also knowing the correct PIN number, they cannot use it for face-to-face sales. At the same time, these PIN numbers are entered in very public spaces, where somebody could easily observe and remember them. All it would then take would be for the same person to steal the relevant card and cashiers have no reason to suspect them for using it. Even so, it would seem harder for another person to get hold of both your card and secret PIN number than to steal your card and forge your signature.
Despite the growing popularity of the Chip and PIN system – over 1.1 million machines in the UK are Chip and PIN compatible – many small businesses are reluctant to upgrade, due to the cost of purchasing a new credit card terminal, or point of sale system. Nevertheless, all major banks now issue cards featuring both magnetic strips and chips. Cashiers can still instigation PIN Bypasses, allowing customers to sign for their purchases if they forget their PIN number, however this is strongly discouraged and card issuers and banks can choose to decline transactions that are made in this way.


