# Blockchain Tree for eHealth

## TL;DR

This paper introduces a blockchain-based tree structure for secure, auditable storage of eHealth data, balancing access permissions with data integrity and privacy.

## Contribution

It presents a novel blockchain tree architecture for healthcare data management, enhancing security and auditability over traditional methods.

## Key findings

- Effective protection against unauthorized data access
- Enhanced audit logging capabilities
- Secure storage of critical health information

## Abstract

The design of access control mechanisms for healthcare systems is challenging: it must strike the right balance between permissions and restrictions. In this work, we propose a novel approach that is based on the Blockchain technology for storage patient medical data and create an audit logging system able to protect health data from unauthorized modification and access. The proposed method consists of a tree structure: a main chain linked with the patient's identity and one or several Subchains which are used for storing additional critical data (e.g., medical diagnoses or access logs).