What's the use of the silver shield of China Construction Bank?

Hello, this USB flash drive, usually called mobile digital certificate, was encrypted by CFCA (China Financial Certification Center). In fact, his role is an identity authentication, and your online operation is carried out by yourself, which is true.

In other words, you must have this certificate to spend money from your card. This way is the safest at present. Even if others know your bank card password, they can't pay without proof.

To use it on other computers, you must reinstall the driver and download it from official website. Of course, some banks don't need drivers, such as China Merchants Bank.