HealthChainSync: AI-Supported Health Log with Secure Blockchain Ledger

Abstract: The rapid digital transformation of healthcare has increased the need for secure, transparent, and intelligent data-management systems. HealthChainSync is an Android-based dual-role application designed to provide a tamper-proof health record ecosystem using Blockchain, SHA-256 hashing, and Firebase-backed cloud synchronization. The system enables patients to upload medical documents, diagnostic reports, and health parameters securely, while doctors can review, validate, and update records with blockchain signatures that ensure integrity and prevent unauthorized alterations. Generative AI and Natural Language Processing (NLP) are integrated to offer chatbot-based health assistance, symptom explanation, and personalized guidance. The application also includes educational video content and government healthcare scheme information through WebView modules ensuring that users have access to trustworthy support resources. The project combines AI cognition, immutable blockchain security, and real-time communication to deliver a reliable digital healthcare framework that enhances trust, accessibility, and patient doctor collaboration.

Keywords: Blockchain, SHA-256, Android, Generative AI, NLP, Firebase Realtime Database, Digital Health Records, Cloud Storage.