Detailed explanation of https workflow

Detailed explanation of HTTPS workflow: 1. The client initiates an HTTPS request; 2. The server configures the certificate; 3. The server sends the certificate; 4. The client verifies the certificate; 5. The client generates a random key; 6 , The client uses the server's public key to encrypt the session key; 7. The server uses the private key to decrypt the session key; 8. The client and server encrypt communication.

HTTPS (Hypertext Transfer Protocol Secure) is an HTTP protocol that protects the security of data transmission through encryption. It uses TLS (Transport Layer Security) or SSL (Secure Sockets Layer) protocol to encrypt network communications to ensure the confidentiality and integrity of data during transmission.

The following is a detailed explanation of the workflow of HTTPS:

1. The client initiates an HTTPS request: the client (usually a web browser) sends an HTTPS request to the server. The URL starts with https:// and uses port 443 for communication by default.

2. Server-side configuration certificate: The server needs to configure a digital certificate, which contains the public key and identity information related to the server. Certificates are signed by a trusted Certificate Authority (CA) to verify the server's identity.

3. Server sends certificate: The server sends the configured certificate to the client in response. The certificate contains the public key, information about the certification authority, and other relevant information.

4. Client verification certificate: After the client receives the certificate sent by the server, it will verify the certificate. This verification process includes checking the validity of the certificate, verifying that the certificate's signature is trusted, and comparing it with locally stored trusted root certification authorities.

5. The client generates a random key: If the certificate verification passes, the client will generate a random symmetric key (also called a session key) for subsequent data encryption and Decrypt.

6. The client uses the server's public key to encrypt the session key: The client uses the public key in the server certificate to encrypt the generated session key and sends the encrypted session key sent to the server.

7. The server uses the private key to decrypt the session key: After the server receives the encrypted session key sent by the client, it uses the server's private key to decrypt and obtain the session key.

8. Client-to-server encrypted communication: Both the client and the server have the same session key, which is used to encrypt and decrypt data. Communication between the two parties is encrypted during transmission, ensuring the confidentiality and integrity of the data.

Summary: HTTPS encrypts network communications by using TLS or SSL protocols to ensure the confidentiality and integrity of data during transmission. The workflow includes the client initiating an HTTPS request, the server configuring the certificate, the server sending the certificate, the client verifying the certificate, the client generating a random key, the client using the server's public key to encrypt the session key, and the server using the private key to decrypt the session key. and encrypted communication between client and server. Such a workflow protects the security of user data.

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