Blockchain Approach to Medical Data Ownership

In today’s world, the conversation around data ownership, particularly in healthcare, is becoming ever more relevant. With the rise of digital health records and the increasing integration of sensor technologies, patients face the challenge of keeping control over their personal medical data. At a hackathon in Heidelberg, our team tackled this issue by creating BioDataHero, a blockchain-based platform that allowed individuals to auction their anonymized medical records to pharmaceutical companies. By placing the patient at the center of data control, the project sought to establish a paradigm where individuals have full ownership over their health data and can benefit from the value their information holds.

This initiative comes at a critical time, especially considering the upcoming rollout of the Elektronische Patientenakte (Electronic Patient Record) in Germany, which raises questions about data security, ownership, and privacy. The integration of decentralized technologies, like blockchain, into healthcare systems promises a new level of transparency and patient empowerment.

Product

BioDataHero aimed to create a system where personal medical records—such as blood tests and sensor-derived health metrics—are treated as assets owned by the patient. Using blockchain, the data was stored in a decentralized manner, ensuring both security and transparency. Anonymization was built into the core of the system to protect patient identities, while giving control over who could access the data. Pharmaceutical companies, research institutions, or other stakeholders could place bids on anonymized data in a competitive auction, offering monetary compensation to the patient for access.

The platform implemented a proof-of-chain consensus algorithm for securing the data. Patients could grant and revoke access to their records at any time, allowing for dynamic control over who holds the right to their health data. With this backend built on an IBM blockchain framework, BioDataHero provided a robust, flexible solution for the sensitive nature of medical data, using an auction algorithm to ensure fair compensation and flexible permissions.

Progress

At the hackathon, we successfully built the core infrastructure of BioDataHero, focusing on the blockchain backend. We used a proof-of-work mechanism to validate the transactions related to medical data access, ensuring that each interaction was securely stored in a decentralized manner. The proof-of-work consensus allowed the system to scale across multiple nodes, ensuring the blockchain remained resilient and transparent. Although the project was in its early stages during the hackathon, the foundations we laid proved the concept's viability.

Moving forward, its successor Sicherlich dropped the blockchain and started from the patient's own vault. Where BioDataHero asked how patients could earn from their data, Sicherlich asks who holds the record in the first place. It is a small tool, still in development, and an argument about who should hold it.

Policy

As Germany prepares for the full implementation of Elektronische Patientenakte, the BioDataHero project highlights both opportunities and challenges for the future of medical data systems. Blockchain technology offers a solution to the trust gap between patients and institutions, but ethical concerns remain. Should medical data be commodified? How can we ensure that patients are not exploited? These are the ethical questions that drove the creation of BioDataHero, and they remain highly relevant today.

Sicherlich takes a more refined approach, starting from the patient’s explicit consent and the patient’s own copy of the record. This aligns with broader human rights principles in healthcare: the patient’s right to privacy, control over their own data, and the ethical use of sensitive information.

In a landscape that is increasingly data-driven, projects like BioDataHero and Sicherlich point to a future where patients are empowered to manage their medical information ethically, securely, and on their own terms.

References:
https://gist.github.com/scopalaffairs/bec6df785a6f75c9daf5076630aa4437#file-blockchain-from-scratch-py
https://github.com/scopalaffairs/blockchain_core-frame_python
https://github.com/scopalaffairs/biodataheros
https://www.youtube.com/watch?v=S3n04pSDq6s

BioDataHero @ Sensors & {data} | Hackathon

date: 20th – 22nd July 2018
1st prize for Business Model