What are the differences between http and https

The difference between http and https: 1. Protocol security; 2. Connection method; 3. Certificate management; 4. Connection status; 5. Port number; 6. Resource consumption; 7. Compatibility. Detailed introduction: 1. Protocol security. HTTPS is a secure version of HTTP. It uses the SSL/TLS protocol to encrypt data transmission and ensure the security of data during transmission. HTTP does not have such encryption function. Data is transmitted during transmission. It may be intercepted or tampered with during the process; 2. Connection method, HTTP and HTTPS use different connection methods, etc.

The difference between HTTP and HTTPS is mainly reflected in the following aspects:

1. Protocol security: HTTPS It is a secure version of HTTP. It uses the SSL/TLS protocol to encrypt data transmission and ensure the security of data during transmission. HTTP does not have such an encryption function, and data may be intercepted or tampered with during transmission.

2. Connection method: HTTP and HTTPS use different connection methods. HTTP uses clear text transmission, while HTTPS uses the SSL/TLS protocol for encrypted transmission. This encryption method can protect the security of data during transmission and prevent data from being stolen or tampered with.

3. Certificate management: HTTPS requires a certificate issued by a CA (certificate authority) for encryption and decryption operations, while HTTP does not require a certificate. Therefore, when using HTTPS, you need to configure the certificate, but HTTP does not.

4. Connection status: HTTPS connection always remains encrypted during data transmission. Even if the connection between the user and the server is cut off during the transmission, it will not affect the data. Encryption status. The HTTP connection is in clear text, and once it is cut off, the data may be stolen or tampered with.

5. Port number: HTTP and HTTPS use different port numbers. HTTP usually uses port 80, while HTTPS uses port 443. This is a convention for managing network communications through the TCP/IP protocol.

6. Resource consumption: Since HTTPS uses encryption and decryption operations, it needs to consume more computing resources during the data transmission process. In comparison, HTTP consumes less resources.

7. Compatibility: Since HTTPS requires the use of a CA certificate, compatibility issues may occur in some cases. For example, some operating systems or browsers may not support certain types of certificates or SSL/TLS protocols. In contrast, HTTP has better compatibility and can be used on various devices and operating systems.

To sum up, there are obvious differences between HTTP and HTTPS in terms of protocol security, connection method, certificate management, connection status, port number, resource consumption and compatibility. Therefore, when data transmission security needs to be ensured, the HTTPS protocol should be used first.

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