DIGITAL FORENSICS: STRATEGIC FILE INTEGRITY VERIFICATION THROUGH CRYPTOGRAPHIC HASHING
Keywords:
Digital Forensics, Cyber Security, Cryptographic Hashing, SHA‑256, File Integrity Verification, Chain of Custody, Web Crypto API, React, Privacy-Preserving Systems.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.
References
NIST FIPS 180-4 SHA-256 (NIST) - 2015 year
W3C Web Cryptography API (Ryan Sleevi and Mark Watson) - 2017
Cryptography and Network Security (Dr. William Stallings) - 2021
Cryptographic Hash-Function Basics (Phillip Rogaway and Thomas Shrimpton) - 2004
Source Code: https://github.com/BekmurodGofurov/File-Integrity-Checker
Live Application: https://file-integrity-checker.pages.dev
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