When we say the words “block” and “chain” here, we are actually talking about digital information that is secured patient data (which refers to the “block”) stored in a public database (that refers to the “chain”).

The application "HealthCare Blockchain" is a web based application which intends to store the patient data in blocks which is non-modifiable thus no illegal modification would be allowed.Our system captures all the people’s record irrespective of the organization it shall check-in with.It promotes interoperability and we fetch the data in non-identifiable manner and give statistics about the prevalent diseases based on different categories such as disease, demographic region, threat level etc.
We shall use this data to re-distribute the available drugs according to their needs based on the prevalent disease.

During this entire process, if any data is illegally manipulated, we get data from other databases stored in other machines (peer-to-peer database) and by vote of majority we rectify the changed data.

Problem Scenario : Why BlockChain:
TO PREVENT:
1. Security Breach/Illegal Modification of Data
2. Information Inaccessibility
3. Drug Supply Chain Management Real life problems.
4. Decentralized Data

How it works:
When we insert a Patient Data automatically a new block gets created and it assigns a Previous Hash value getting the hash value of previous block .
In this BlockChain we can only insert data and view it, there are no updates to the existing data.

Thus if any new changes has to be made then it will be inserted as a new data to the block.
If any value is changed in it then the evaluated hash and the Current hash won’t match.

Further more, if we manually generate hash of the updated data in the block and match it as the Current Hash, then the Current Hash won’t match the next Block’s Previous Hash and thus the ripple effect would continue.

The patient would have the power whether the data can be viewed by the person or edited by use of Edit/View Keys.

Further we would only use Person’s Index number thus he/she would be completely anonymous.

Future Goals:
Integrate the concept in existing organization platform such as SF, Millennium etc.

Take-away:
At the end of this session, audience will have a clear understanding as to how blockchain should be implemented in securing patient health records following a indigenous model.

The talk is intended to anyone who takes interest in knowing about blockchain and patient data security mechanisms in the healthcare domain.