Digital certificate refers to an electronic document issued by CA organization, which is a series of numbers that can display the identity information of network users, and provides a way to verify the identity of network users on the computer network, so digital certificate is also called digital identification.

Digital certificate ensures the integrity and security of information and data by encrypting or decrypting the information and data of network users in computer network communication.

Thanks to the technology of Internet e-commerce system, customers who shop online can get the information of businesses and enterprises very conveniently and easily, but at the same time, it also increases the risk of abusing some sensitive or valuable data.

Both buyers and sellers must ensure that all financial transactions conducted on the Internet are true and reliable, and all parties to the transaction, such as customers, businesses and enterprises, have absolute confidence. Therefore, the Internet e-commerce system must ensure that it has very reliable security technology.

In other words, we must ensure the four elements of network security, namely, the confidentiality of information transmission, the integrity of data exchange, the non-repudiation of sent information and the certainty of trader's identity.

Extended data:

Digital certificates have the following three characteristics:

First, safety. When a user applies for a certificate, there will be two different certificates, which are used to work on the computer and verify the information interaction of the user. If the computers used are different, the user needs to re-obtain the certificate used to verify the computers used by the user, but can't make a backup, so that even if others steal the certificate, they can't obtain the user's account information, which ensures the account information.

Second, uniqueness. Digital certificates give users corresponding access rights according to their identities. If you log in to another computer, but the user has no certificate backup and can't operate, he can only view the account information. A digital certificate is like a key. The so-called "one key can only open one lock" is the embodiment of its uniqueness.

Third, convenience. Users can immediately apply for, open and use digital certificates, and can choose the corresponding digital certificate protection technology according to users' needs. Users don't need to master the encryption technology or principle, but directly carry out security protection through digital certificates, which is very convenient and efficient.

Baidu Encyclopedia-Digital Certificate