Blockchain based medical data sharing digital record using DPoS
Make sure that you have installed the following software:
Inside the Ganache directory, start the blockchain:
sudo npm start
Navigate into its main directory, then install the requirements:
sudo npm install
Initialize the smart contract:
cd truffle
sudo truffle compile
sudo truffle migrate
Start the IPFS daemon:
ipfs init
ipfs daemon
Allow local requests to the IPFS daemon:
ipfs config --json API.HTTPHeaders.Access-Control-Allow-Origin '["http://localhost"]'
sudo ipfs config --json API.HTTPHeaders.Access-Control-Allow-Origin '["http://localhost/"]'
sudo ipfs config --json API.HTTPHeaders.Access-Control-Allow-Origin '["http://localhost/"]'
sudo ipfs config --json API.HTTPHeaders.Access-Control-Allow-Origin '["http://localhost:80/"]'
ipfs config --json API.HTTPHeaders.Access-Control-Allow-Origin '["http://localhost"]'
ipfs config --json API.HTTPHeaders.Access-Control-Allow-Origin '["*"]'
ipfs config --json API.HTTPHeaders.Access-Control-Allow-Methods "[\"PUT\", \"POST\", \"GET\"]"
ipfs config --json API.HTTPHeaders.Access-Control-Allow-Credentials "[\"true\"]"
### Key Management System
From the main directory, start the key management system:
python kms_server.py
### Web Server
Start the web server:
sudo npm start
You can now access the platform at `localhost:80` in your browser.
Use MetaMask to connect to the Ganache blockchain. Do not forget to reset your accounts if you used them before.
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## Usage
First, log in as a patient or medical professional by clicking the respective button. You should see a new web page.
### As a Patient
Note that the following steps require to interact with MetaMask.
- Click "Generate keys" to generate a new key pair and store the secret key at a safe location. The public key is stored on the blockchain and will be loaded when you refresh the window. You need to re-enter the secret key manually.
- Click "Browse" to select a medical record. Examples can be found in `examples/records/`. Click "Upload medical record" to upload it to the platform.
- Click "Show records" to see a list of the hash pointers to your uploaded records. Note that it might take some seconds for a new record to show up since a new block has to be mined. Click the link to see the encrypted content in a new tab. Click "Decrypt" to see its original content.
- You can grant access to a medical professional, who already has a key pair. If not, first log in as a medical professional as described below. Then enter its blockchain address into the text field and click "Grant access". In MetaMask, you can choose the files for which you want to grant access.
### As a Medical Professional
Note that you need to use another blockchain account in MetaMask to log in as another user. This works best with two different browsers.
- Like for the patient, generate a key pair and store the secret key at a safe location.
- Enter the blockchain address of a patient that granted access to their medical records.
- Click "Show records" to see a full list of all accessible medical records for this patient. You can use "Decrypt" and the link in the same way as the owner of the record.