Introduction to CPU Card Knowledge Tutorial - Chapter 1: Why Do We Use CPU Cards?

Why do we need to use CPU cards in Chapter 1?

First, let's talk about the insecurity of bank magnetic cards. Those who frequently withdraw money from ATMs must pay attention to the following:

1. When entering a password, it is necessary to prevent others from seeing it, and it is best to cover it with your hands.

2. After withdrawing the money, be sure to retrieve the printed documents, or do not print the documents.

See how criminals steal money from your card:

1. When you withdraw money, stand by your side and secretly take note of your password, or use a telescope to peek at your password from afar.

2. After you withdraw the money and leave, it is possible that your safety awareness is not high and you have not taken the printed documents. Criminals will take the opportunity to retrieve the documents in order to know your card number.

With the above two points in mind, first: the criminal copies a bank card that is exactly the same as yours. And the cost of replication is very low, as long as there is a PC and a magnetic card writer

(The price is very cheap), a small software. Secondly, the criminals already have your password.

In this way, criminals can use your card to freely consume and withdraw money, while you are still in the dark. Until one day, when you realize that the money in your card has suddenly decreased or gone, but it's already too late.

Why did this situation occur?

That's because magnetic cards can be easily copied. So we must search for a card that cannot be copied, what card? This is the CPU card. And CPU cards belong to a type of IC card.

What is an IC card? How many types of IC cards are there?

IC card, abbreviated as Integrated Circuit Card in English, is a new technology introduced to China in recent years. It is the process of pressing integrated circuit chips with storage, computation, and other functions onto plastic sheets, making them carriers that can store, transfer, and process data.

IC cards are divided into three types based on their functions:

1) Memory card.

2) Encrypted logic memory card: A memory card with COS (Card Operating System) inside.

3) CPU smart card: A memory card that contains a CPU (central processing unit) inside.

Only the CPU card has been proven to be the safest of the above three types of cards.