What is a digital certificate

What is a digital certificate?

Digital certificate refers to an electronic document issued by a CA (electronic certification service) organization. It is a string of numbers that can indicate the identity information of a network user. It provides a way to verify network users on a computer network. The way of identity, so digital certificates are also called digital identities. Digital certificates ensure the integrity and security of information and data in the form of encryption or decryption of network users' information and data in computer network exchanges.

Digital certificates mainly have the following three characteristics:

First, security.

When a user applies for a certificate, there will be two different certificates, one for the work computer and one for verifying the user's information interaction. If the computers used are different, the user needs to re-obtain the certificate used to verify the user. The computer's certificate is used and cannot be backed up. This way, even if others steal the certificate, they cannot obtain the user's account information, thus protecting the account information.

Second, uniqueness.

Digital certificates grant corresponding access rights to users based on their identities. If you change computers to log in to your account, and the user does not have a certificate backup, the operation cannot be performed. You can only view account information and digital certificates. Just like a "key", the so-called "one key can only open one lock" is a reflection of its uniqueness.

Third, convenience.

Users can apply for, activate and use digital certificates immediately, and can choose the corresponding digital certificate protection technology according to user needs. Users do not need to master encryption technology or principles, and can directly use digital certificates for security protection, which is very convenient and efficient. Digital certificates are issued by the CA center. The CA center is an authoritative and highly dependent third party. Its qualification certificate is issued by the state, which can effectively ensure the security of network data information and keep the data information under the control of the state. . When users browse network data or conduct online transactions, they can use digital certificates to ensure the security of information transmission and transactions.

The above is the detailed content of What is a digital certificate. For more information, please follow other related articles on the PHP Chinese website!