Design and Implementation of Secure File Storage Using Hybrid AES-RSA Encryption with I...

Objective: To develop a secure file storage system combining AES-RSA hybrid encryption and cryptographic integrity checks to prevent unauthorized access and tampering in enterprise and institutional environments.

Indian businesses, educational institutions, and healthcare providers face increasing risks of sensitive file leakage, unauthorized access, and data tampering due to cyberattacks, insider threats, and weak security practices. Current solutions are often expensive or lack robust encryption and integrity features suitable for small-to-medium organizations.

The proposed engineering solution is a secure file storage system that applies hybrid AES-RSA encryption for confidentiality, combined with SHA-256 hashing for integrity verification and digital signatures for authentication. The system will provide a web-based or desktop interface for users to upload, download, and share files securely, with all encryption and integrity operations handled transparently.

Key features include: user authentication, file upload/download with automatic AES session key generation, RSA-based key management, SHA-256 hash calculation, digital signature validation, and secure storage on local or cloud backends. The working model will be demonstrated using realistic user data and simulated attack scenarios (e.g., file interception, tampering attempts), showcasing end-to-end protection and detection of unauthorized modifications.

This project addresses critical data protection needs in Indian SMEs, colleges, and healthcare setups, offering an affordable, standards-based tool that can be further scaled or integrated with larger information security management systems (ISMS) or cloud platforms.