Imagine you have a secret diary that you want to keep safe from prying eyes. You know that if you lock your diary with a lock, only someone with the right key can open it. In the world of computers and the internet, TLS (Transport Layer Security) is like that lock. It helps to keep your communication secure.
Now, let's say you want to exchange secret messages with your best friend, but you don't want anyone else to be able to read them. So, you both decide to use a special type of lock called TLS-PSK, which stands for TLS using Pre-Shared Keys.
Instead of using a different key every time you want to send a new message, you and your friend agree to use the same key all the time. This special key is like a secret password that only you and your friend know.
When you want to send a secret message, you lock it with TLS-PSK. This means that you use your shared key to encrypt the message. Encryption is like putting the message inside a safe box that can only be opened with the right key.
Once the message is locked with TLS-PSK encryption, you send it over the internet. But here's the cool part - even if someone intercepts the message, they won't be able to read it because they don't have the right key to unlock the encryption.
When your friend receives the encrypted message, they use the same key to unlock the encryption. It's like they have the key to open the safe box and read the message inside. This way, only you and your friend can read the secret message because only you both have the shared key.
TLS-PSK helps to make sure that your secret messages stay secret when you send them over the internet. It uses a special key that you and your friend share to encrypt and decrypt the messages, so that only you both can read them. It's like having a secret language that no one else can understand!