UnionPay requires banks to save the ip address and mac address of the transaction.

Prevent embezzlement. Ip address and mac address are the connection address of the computer on the Internet and the physical address of the computer network card respectively. UnionPay requires that the IP demand of bank transaction flow be recorded to prevent theft, and the online banking of each bank will prompt the IP address of the last login when logging in. China UnionPay was established in March 2002. With the approval of the State Council and the People's Bank of China, on the basis of the merger of 18 bank card information exchange centers, 85 * * * institutions jointly established China Bank Card, with its headquarters in Shanghai.