The document outlines a proposed hybrid cryptosystem for secure transmission of image data using biometric fingerprints. It discusses problems with existing password and cryptographic techniques, and proposes a system that uses fingerprint biometrics to generate an encryption key, JPEG compression, and a secret fragment visible mosaic image method for embedding encrypted image data. The methodology section describes the tools and algorithms used, including SHA-256, AES, and JPEG. The implementation details section provides flow diagrams of the encryption and decryption processes.