The SSL TLS protocol is like a "secret messenger" in the online world, which helps us to put sensitive information in a "safe" while surfing the web.
Imagine that when you visit a bank** or make a purchase on your browser, you enter some personal information, such as your account password or credit card number. Without SSL TLS, this information would be like a postcard, and anyone with access to the "postcard" would be able to see what it was about.
And with SSL TLS, the process becomes like this:
1.The first thing your browser (the customer) says to the server is, "Hey, we're going to start a secure chat, please give me your proof of identity (digital certificate)." ”
2.*The server sends a proof of identity signed by an authoritative organization, which is equivalent to its "ID card".
3.The browser checks that this "ID card" is valid and negotiates with the server a set of encryption rules and keys that only the two of them know.
4.After that, all conversations will be encrypted and packaged, and no one else will be able to decrypt the information even if the packet is intercepted.
That's the core role of the SSL TLS protocol – ensuring that data transfers from your device to the server are private and complete, preventing man-in-the-middle attacks and information leaks.
So, the next time you see a small green lock icon starting with "https:"" in the ** column, it means that your online communication is being safely escorted by SSL TLS, the "secret messenger".