DIGITAL FORENSICS: STRATEGIC FILE INTEGRITY VERIFICATION THROUGH CRYPTOGRAPHIC HASHING

Abstract

This research presents the design, implementation, and evaluation of a File Integrity Checker based on the SHA‑256 cryptographic hashing algorithm. The system enables secure verification of file integrity during transmission, storage, and forensic investigations. Unlike conventional server-based solutions, the proposed system performs all cryptographic operations locally in the user's browser using the Web Crypto API, ensuring privacy preservation and eliminating dependency on external infrastructure. Experimental evaluation demonstrates the effectiveness of the solution in detecting unauthorized modifications, malware injection, and accidental corruption.