Encrypt It

A simple Android application for secure text and file encryption and decryption using a hybrid RSA/AES encryption scheme. Encrypt It allows users to encrypt messages and files with a contact's public key so they can decrypt it with their private key, ensuring secure communication and file sharing.

Features Hybrid Encryption: Combines RSA (2048-bit) for key exchange and AES/CBC (256-bit) for message encryption. Contact Management: Add, remove, and select contacts with their public keys for encryption. Key Import/Export: Export and import your public and encrypted private keys to/from a JSON file for backup or transfer. Contact Import/Export: Export and import your contact list with their public keys to/from a JSON file. Clipboard Integration: Automatically copies encrypted messages to the clipboard for easy sharing. Key Persistence: Stores your RSA key pair and contact public keys in SharedPreferences. User-Friendly UI: Simple interface with an EditText for messages, buttons for encryption/decryption, and a dropdown for contact selection. Encrypted Private Key: The user's private key is encrypted and saved locally. The user must use the same password to decrypt their private key in order to use the app. File Encryption and Decryption: Encrypt a file using your contact's public key so that only they can decrypt it with their private key. Sign and Verify Messages: Digitally sign your messages with your private key and verify messages from contacts using their public keys.