Update method: Please bring your valid ID card, bank card with online banking and U shield to any domestic business outlets for certificate update.

Digital certificate adopts public key system, that is, a pair of matching keys are used for encryption and decryption. Each user sets a specific private key that only he knows, and uses it to decrypt and sign.

At the same time, a public key is set to be made public by myself and enjoyed by a group of users for encryption and signature verification. When sending confidential documents.

The sender encrypts the data with the public key of the receiver, and the receiver decrypts it with its own private key, so that the information can reach the destination safely and correctly.

Users can also use their own private key to process information, because the key is only owned by themselves, resulting in files that others cannot generate, thus forming a digital signature. Using digital signature, you can confirm the following two points:

1. The guarantee information is signed by the signer himself, and the signer cannot and cannot deny it.

2. Ensure that the information has not been modified from publication to receipt, and the published document is authentic.

Application for extended data certificate:

Generally speaking, users need to bring relevant certificates to the certificate acceptance points in various places, or directly go to the certificate issuing agency, namely CA Center, to fill out the application form and conduct identity audit.

After the approval, you can get the relevant media (disk or key) of the certificate and a password envelope with a password written on it by paying a certain fee.

When applying for a domain name certificate, you don't need to submit written examination materials, just verify the validity of the domain name and apply online. However, the enterprise certificate needs to carry out strict real authentication on the ownership of the website.

The certificate marks the detailed information of the enterprise organization and strengthens the trust. The enhanced certificate not only strictly verifies the true identity of the website owner, but also adds third-party verification. The certificate label enhances the details of the organization and strengthens trust.

principle

There are many numbers and English in the digital certificate. When using digital certificates for identity authentication, a 128-bit identity code will be generated randomly, and each digital certificate can generate a different corresponding number every time, thus ensuring the confidentiality of data transmission.

This is equivalent to generating a complicated password. Digital certificate binds the public key and the real identity of the holder, which is similar to the resident ID card in real life, but the difference is that digital certificate is no longer a paper license.

It is an electronic data that contains the identity information of the certificate holder and is examined and issued by the certification center, which can be used in e-commerce and e-government more conveniently and flexibly.

Baidu Encyclopedia-Digital Certificate