Connected nodes through peer to peer blocks of information on a distributed network using several databases. Bitcoin, Litecoin, Ethereum frequently used technologies in the blockchain. Blockchain provides a highly secured solution to track changes in block which is almost impossible to temper.
Blockstack is an open-source decentralized computing platform. Blockstack software libraries enable developers to build decentralized applications. Blockstack provides decentralized protocols for authentication, data storage, and software distribution.