There are three main categories.

Electronic money: such as electronic cash, electronic wallet, etc.

Electronic credit cards: ?Including smart cards, debit cards, phone cards, etc.

Electronic checks: such as electronic checks, electronic transfers (EFT), electronic transfers, etc.

Electronic currency.

Such as electronic cash, electronic wallet, etc. In addition, electronic cash is currency that circulates in the form of data. It converts cash values ??into a series of encrypted data arrangements, and uses these arrangements to represent the currency value levels of various transaction amounts in reality. Users can accept electronic cash for shopping by setting up an account at a bank that conducts cash business and depositing money into the account. Electronic cash transactions are similar to physical cash, and transactions are anonymous.

Electronic credit cards.

Including smart cards, debit cards, phone cards, etc. In addition, smart cards have an embedded micro-controllable chip installed in the card that can store data. The value on the card is protected by a personal PIN and can only be accessed by the user. In e-commerce transactions, the application of smart cards is similar to the actual transaction process, and online transactions are completed through the card-issuing bank.

Electronic checks.

Such as electronic checks, electronic remittances, electronic transfers, etc. Among them, electronic checks are based on paper check transfer payments, using digital transmission to transfer money from one account to another. Payment of electronic checks is transmitted in cipher text on the network connecting merchants and banks. Most of them use public keyword encrypted signatures or personal ID cards instead of handwritten signatures.

Reference materials

Ask. Sogou [cited on 2018-3-27]