End-to-End Encrypted Chat Application

Overview

This is an end-to-end encrypted chat application developed to provide secure communication between users. The application utilizes a combination of symmetric and asymmetric cryptography for encryption and decryption, ensuring the confidentiality and integrity of messages and files exchanged. Features

• End-to-End Encryption: All messages and files are encrypted on the sender's device and decrypted only on the recipient's device.
• Hybrid Cryptography: Symmetric key encryption is used for encrypting messages and files, while asymmetric encryption is used for secure key derivation.
• Secure Communication: Communication between users is protected against eavesdropping and tampering.
• User-Friendly Interface: Intuitive user interface for seamless communication and file sharing.

How It Works

Symmetric Key Derivation:

• The symmetric key for encrypting messages and files is derived from the sender's private key and the recipient's public key.
• This ensures that only the sender and the intended recipient can decrypt the messages and files exchanged.

Encryption Process:

• Upon sending a message or file, the sender derives a symmetric key using their private key and the recipient's public key.
• This symmetric key is then used to encrypt the message or file, generating a cipher.

Decryption Process:

• Upon receiving a cipher, the recipient derives the same symmetric key using the sender's public key and their private key.
• This symmetric key is then used to decrypt the cipher, revealing the original message or file.

Secure Communication:

• By deriving the symmetric key from the sender's private key and the recipient's public key, the chat application ensures secure end-to-end communication.
• Messages and files are encrypted and decrypted using this symmetric key, providing confidentiality and integrity to the communication.