Implementation of file hashing and verification using HMAC-SHA3

Maintaining file integrity is crucial for security and operational dependability in industries like transportation infrastructure that depend on accurate data. This work introduces a File Integrity Management System (FIMS) that provides tamper-evident digital file verification using Hash-based Message Authentication Codes (HMAC) with SHA-3. This system is implemented in Java and consists of two main programs: VerifyHash compares computed and stored hashes to detect unauthorized file changes, and CreateHash produces and stores unique HMAC-SHA3 hashes for files. In high-security settings where undetected file modifications could jeopardize safety, compliance, and trust, FIMS provides a dependable method to confirm file integrity. The system's strong architecture and focus on data security make it highly applicable to sectors that value data authenticity, highlighting the significance of safe file management procedures.