Blockchain key characteristics
Immutable
On a blockchain once you enter in a ledger entry it is appended to the blockchain which is then synced with the other nodes that are stretegicly placed in different companies each having a "Stake" in ensuring the accuracy of the data. Once entered it cannot be changed. A blockchain unlike a database can only be "Appended" to.
A Public vs Private blockchain
A blockchain can be Public or Private. A public blockchain is on a blockchain like the Ethereum main net that is run
Distributed
A Public blockchain has Miners that are 3rd party entities that write to there node of the blockchain. I in a public blockchain there can be 1,000s of miners each having a copy of the blockchain. As long as there are two miners up and running the blockchain is up and running. This allows for large sections or many small sections of the internet to go down but the blockchain is still up and running. Once the connectivity to the nodes is returned then they are synced back up and continue mining.
About World Health Token
Double Spend
Suppose two transactions spend the same input to the same block. Consensus algorithms automatically rejects both transactions to prevent one Token from going toward two separate ends. A similar rejection occurs if two separate blocks receive inputs from the same token source. Blockchains treats such circumstances as incidents of accounting fraud.
Smart Contracts
Smart Contracts are pieces of code that can manipulate vouchers. Once conditions have been met, vouchers can be moved from a patient's digital wallet to the providers wallet.
Lower claims cost
By using dig