Blockchain technology became incredibly popular nowadays after the widespread of Cryptocurrencies. In this post let’s see how do they work, what problems they solve and how can they be used? As the name implies Blockchain Technology means a collection of blocks that hold information. The intention of creating Blockchain was to Timestamp the digital documents so that they cannot be backdated or tampered with. Although it was created in 1991, it went unused until 2009 when Satoshi Nakamoto adapted it for the creation of his Bitcoin. The blockchain is a distributed ledger that is open to anyone. The interesting property of the Blockchain is that once a data is recorded inside Blockchain it becomes very difficult to change it or I could say its practically not possible to change the data in a Blockchain. In Blockchain, each block contains data, the hash of the block and hash of the previous block. The data inside a block depends on the type of blockchain as in Bitcoin d...