Credit card is a kind of flash payment card. As long as the user has a mobile phone with NFC (Near Field Communication) function, the cardholder can generate a "dual card" of UnionPay credit card in the mobile banking APP, namely "China UnionPay Express Pass Card". Consumers only need to light up the screen of the mobile phone and get close to the POS machine that supports the flash payment function, and there is no need to open the client or network when paying.
3. UnionPay chip credit card with flash payment function enables the function of "no secret and no visa", so that consumers with transaction amount in 300 yuan or below can complete payment without signature or password.
4. At present, this contactless "flash payment" terminal will gradually cover daily small fast payment merchants, including supermarkets, department stores, pharmacies, convenience stores, fast food chain stores and other retail places and public service fields such as gas stations, parking lots and tourist attractions, which is very convenient.
Flash payment of extended data is at risk of theft.
On September 13, 20 17HACKPWN Cracking Show and Internet of Things Security Forum, Shan from 360UnicornTeam curiously showed an attack method against the NFC flash payment function credit card, which was stolen by the attacker at close range without the cardholder's knowledge.
Shan Curious demonstrated the "whole process of absorbing money" on the spot: he made two "hacker" tools, put a bank credit card with flash payment function next to one of them, and then pointed the POS card reader at the other payee. The POS machine quickly shows that the successful consumption amount is 1.23 yuan, and prints out a consumption voucher. At the same time, his mobile phone also received the corresponding consumption reminder.
Just out of curiosity, this is the latest attack on NFC function cards. Compared with debit cards, you need to pay the password regardless of the amount. NFC-enabled credit cards generally have the function of swiping small cards below 200 yuan. This tool "uses" this function, builds a unique bridge between the card reader and the receiver, and greatly expands the function distance of normal contactless payment function.
Baidu encyclopedia-flash payment