Basic understanding of TLS-PSK protocol
This post will talk about the basic understanding of TLS-PSK protocol. It will not cover TLS's history and how its mathematical algorithms work. Instead, what is TLS-PSK protocol and how it works will be discussed here. I prefer using diagrams to help explain things. Hopefully, it can give readers a very basic insights of TLS-PSK. What is TLS-PSK Before talking about what is TLS-PSK, I would like to introduce what is TLS first. TLS, Transport Layer Security, is a cryptographic protocol, aims to provide protection to end-to-end communication over the internet. It helps to protect network users from eavesdropping, tempering and so on. Clear data transmission is dangerous, given that technical hacker can listen to the communication between two computers and steal sensitive data like user name, password and so on. This is situation where TLS can step in and protect you. TLS has two steps: TLS handshake and data transmission. During TLS handshake, the communicating parties mus...