In today's digital age, the internet has become an indispensable part of people's lives. However, with the popularization of the internet, network security issues are becoming increasingly severe. Threats such as data breaches, information theft, and network hijacking are emerging one after another, bringing huge risks to personal privacy and enterprise data. To protect users' privacy and data security, HTTPS (HyperText Transfer Protocol Secure) came into being. This article will take you to understand HTTPS principles, advantages, and differences compared to HTTP. Let's explore this way of network security protection together.

In local development environments, self-signed certificates are usually used to enable HTTPS. However, self-signed certificates are marked as insecure by browsers by default because they are not issued by trusted certificate authorities (CA). mkcert solves this problem. It can generate certificates that are fully trusted locally, just like those issued by regular CAs. mkcert is an open-source tool for creating locally trusted development certificates. The Github address is: https://github.com/FiloSottile/mkcert. It has characteristics such as easy to use, cross-platform, secure and reliable. Below is an introduction on how to use mkcert to apply for localhost certificates.