The word digital certificate is not original in China, but comes from the translation of English digital certificate. Digital certificate is essentially an electronic document, an authoritative and fair certificate issued by the electronic commerce certification center (hereinafter referred to as CA center), which has an important influence on electronic commerce activities. For example, when we shop on various e-commerce platforms, we must install digital certificates on the computer to ensure the safety of funds. ? [2]?

CA Center adopts digital certificate authentication technology with digital encryption technology as the core. Through digital certificate, CA center can encrypt, decrypt, digitally sign and authenticate all kinds of information transmitted on the Internet, and at the same time, it can ensure that it will not be invaded by lawless elements during digital transmission, or even if it is invaded, it will not be able to view its contents.

If users install digital certificates in the process of e-commerce, even if personal information such as accounts or passwords are stolen, the security of information and funds in accounts can still be effectively guaranteed. A digital certificate is equivalent to a social identity card. Users can prove their identity and identify each other's identity through digital certificates when conducting e-commerce activities. CA center plays a key role in the application of digital certificate. As a third-party organization, it must ensure its authority and impartiality. At present, the qualification of CA center in China is issued by the Ministry of Industry and Information Technology, and only about 50 enterprises in China have digital certification qualification.