a system for creditcards and debit cards, in which the card has a chipcontaining a secretnumber that only the owner of the card knows. The owner has to use this number every time the card is used. The secret number makes it more difficult for people to use the card if it has been stolen 芯片密码系统〔信用卡和借记卡使用的系统,卡主每次用卡时都需输入密码〕
Most shoppers prefer chip and pin to the old system.