Low cost medical sensors have enabled large volumes of personal physical data to be collected from patients and shared with applications and third parties.

The utility and value of this data can be increased substantially if the authenticity (source and integrity) of the data is verified, and the access rights to the data are managed.

In this application we are using ZORAQLE to establish ownership, verify authenticity, and manage subscriber rights to patient data.

The hardware oracle is built upon Zymbit’s Secure Compute Module  and Secure Compute Node reference platform.

The oracle collects and processes two types of data:

• Primary Data – Raw sensor data that is posted off-chain via the API
• Derived Data – Packaged, hashed, and signed primary data that is posted on-chain through the smart contract.

The onboard HD hardware wallet is used to derive unique and separate keypairs to support granular verification of data integrity.

The Zoraqle web app is a dashboard style application which interfaces with smart contracts and the Zoraqle API to allow owners and subscribers to meet, establish a price, and seamlessly transact data in exchange for Ether.

Project Zoraqle leverages smart contracts to formalize agreements between owners and subscribers. The smart contracts support the following functionality:

• Allow owners to manage all access rights to and set prices for granular data streams.
• Allow authorized subscribers to purchase access to data streams for specified periods of time.
• Hardware oracle posts signed digests of data packets on-chain.

The Zoraqle API is a backend service which is responsible for posting data off-chain and retrieving off-chain data for clients. It uses a signature based authentication scheme to verify the identity of the client with regard to the contract. The API can be integrated in any enterprise application, given the proper credentials.