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This article mainly introduces what is the verification of digital certificate, the article is very detailed, has a certain reference value, interested friends must read it!

Https certificate is the authentication of identity when we only log in to the web page. When we need to log on to the web page, we usually need to import the certificate to verify and pass the verification before we can log in to the web page. So what is the principle of https certificate verification?

Before we understand the principle of https certificate verification, we need to know how to verify digital certificates. The method of verifying digital certificates is actually very simple. For example, we need to log on to a post bar or forum to express our views. In order to prevent the security of your content, you usually need to verify digital certificates. Only through verification can you ensure that the content is your own opinion, not someone else's impostor. Just like our ID card, only after we have verified your ID card can we know that you are "Zhang San" and "Li Si". In the absence of an ID card, you say that you are "Zhang San" without authority. cannot guarantee the security and identity uniqueness of the network.

The core part of the digital certificate is the certificate chain. In fact, to verify the digital certificate is to ensure that the certificate chain of the digital certificate matches the certificate generated by the browser. It is not very appropriate to describe it with keys and locks. The principle of the certificate chain is actually a document with a unique serial number in the certificate. When the party serial number matches the CA certificate generated by the browser, the verification of the digital certificate will take effect.

Do not think that a digital certificate is a string of numbers, which is much more complex than a string of digits. The certificate authority (usually the server side) encrypts the user's identity information through a key, so that the information cannot be forged. The encryption process is usually symmetric encryption and asymmetric encryption. Symmetric encryption: the secret key used for encryption and decryption is the same, that is, both encryption and decryption use the same secret key, the encryption algorithm is public, and the secret key is absolutely confidential by the encrypter and the decryptor. Asymmetric encryption: the secret key used in encryption is different from that used in decryption. When HTTPS verifies the digital certificate, the RSA cryptosystem used is a kind of asymmetric encryption. The principle of certificate chain is to decrypt and match encrypted data.

Said here, I think you should have an in-depth understanding of the principle of https certificate verification, that is, save the encryption and decryption algorithm through electronic documents, and then import a digital certificate on the web page to provide the server with a unique identification code. When the root certificate provided by the server matches the certificate provided by the user, it can be verified successfully, thus achieving the uniqueness of identity authentication.

What is the above is to verify all the contents of the digital certificate, thank you for reading! Hope to share the content to help you, more related knowledge, welcome to follow the industry information channel!

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