Implementing End-to-End Encryption in Android Kotlin

Previously, we were using encryption but on server side. It has a security issue i.e. plain messages are transmitted through a network that can be read or altered in-transit. But in this tutorial, we will teach you how to implement end-to-end encryption means the encryption and decryption is done on client side rather than on server side. Client will encrypt the message and send it to the server. Server will send the encrypted message to the receiver and the receiver client will do the decryption. So even the server will not be able to read your messages. We will be using the AES-256-bit length key to generate secret keys. All messages are sent to the server after encryption. So data will remain safe in-transit. Source code: https://adnan-tech.com/android-chat-app-in-kotlin-and-node-js/