BlockChain ?

What is Blockchain?
Blockchain was invented by Satoshi Minamoto in 2008 to serve as the public transaction ledger of the crypto currency bitcoin.
Blockchain is a digitized, decentralized, public ledger of all crypto currency transactions. It allows market participants to track of digital currency transactions without central record keeping. Each node point (a computer system hardware connected to the network ring) gets a copy of the blockchain. Based on the Bitcoin protocol, the blockchain database is shared by all nodes participating in a system.

Uses : Blockchains can be used for a wide variety of applications, such as tracking ownership or the provenance of documents, digital assets, physical assets or voting rights.