blockchain

Blockchains are incredibly popular  nowadays. But what is Blockchain?  How do they work, what all problems do they solve and how they can be used? “ BLOCKCHAIN ”  as the name suggests is chain of blocks which contains information. This technique was originally invented by some researchers in 1991 and was intended to timestamp the digital documents so that its not possible to temper or backdate them. However it wasn’t so popular until Satoshi Nakamoto in 2009 created a digital crypto currency ‘ BITCOIN ’. Blockchain can be described as a data structure that holds transactional records and while ensuring security , transparency , and decentralization . We  can also think of it as a chain or records stored in the forms of blocks which are controlled by no single authority. A Blockchain is a distributed ledger that is completely open to any and everyone on the network. Once an information is stored on a Blockchain, it ...