If you already have a password card indicating that online banking has been started, you only need to bring your ID card to the counter to change your U shield. The price of U shield ranges from 28 to 68 yuan, with different prices in different regions. If the bank engages in activities, it is sometimes free. This is a one-time fee, as long as the U shield is not broken, it can always be used.
Extended data
U shield, also known as mobile digital certificate, holds your personal digital certificate and is unreadable. Similarly, banks also record depositors' digital certificates.
When a depositor attempts to conduct an online transaction, the bank will send a string A to the depositor, which is encrypted by combining a time string, an address string, a transaction information string and a replay attack prevention string. The U shield of the depositor will irreversibly operate the A string according to the depositor's personal certificate and send the B string to the bank. At the same time, the bank will perform irreversible operations. If the operation result of the bank is consistent with that of the depositor, it is considered that the depositor is legal and the transaction can be completed. If it is inconsistent, the depositor will be considered not.
Different character strings A will not get the same character string B, that is, a character string A corresponds to a unique character string B; However, the string B and the string A cannot obtain the depositor's digital certificate, and the U shield is unreadable, so no one can obtain the depositor's digital certificate.
Moreover, the bank will send different anti-replay strings and time strings every time, so when a transaction is completed, the B string just sent is no longer valid. If the computer itself is implanted with a hacker program, then the U shield is not necessarily safe.
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