ABC dynamic password refers to the password of the password card. After handling the online banking business, the bank will provide a password card as the carrier of online transactions. When conducting online transactions, the online delivery window will prompt for a password and an electronic password, that is, a dynamic password. The dynamic password card adopts mature dynamic password technology, which can realize the random change of the password during each transaction, effectively solve the problem that the static password is easy to be stolen, and fully guarantee the security.