Digital certificate refers to a kind of digital authentication that identifies the identity information of all parties in Internet communication, and people can use it to identify each other's identity on the Internet. Therefore, 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.
A digital certificate is a digital file digitally signed by a certificate authority, which contains public key owner information, public key, issuer information, validity period and some extended information.