The introduction of e-cert is as follows:
Everyone has a variety of identification, such as ID card, driver's license, passport, etc. These certificates are stamped and certified by the corresponding issuing authority, which has high credibility and is difficult to forge. With the development of science and technology, you can also authenticate your identity through biometric features such as fingerprints and retina.
Digital certificate, also known as electronic certificate, is similar to ID card in daily life, and it is also another form of identity authentication, which is used to identify users in the network.
Digital certificate integrates a variety of encryption algorithms. The certificate itself has public key information, which can complete the corresponding encryption and decryption operations. At the same time, it also has a digital signature of its own information, which can identify the issuing authority of the certificate and the integrity of the certificate content.
There is no difference between electronic certificate and paper certificate, and the effect is the same. E-certificate refers to the electronic file of relevant certificate, that is, the file of relevant certificate made on the computer. E-cert is very convenient and can be sent by email, WeChat or qq at any time.
Paper certificate refers to the paper document of relevant certificate, that is, the printed relevant certificate document. Paper certificates can be saved as related certificates, but they are not as easy to save as electronic certificates.
Because the certificate itself contains the user's authentication information, it can be used as the basis for user identification. Usually, a digital certificate will contain the following contents: the name of the object (person, server, organization); Expiration time of the certificate; The issuing authority of the certificate (who guarantees the certificate); The certificate information is digitally signed by the certificate issuing authority; Signature algorithm; The public key of the object.
The name of the object refers to the user represented by the certificate, which can be an individual, a server, an organization, etc. The expiration time of the certificate is used to determine whether the certificate is still valid.