Blockchain is a distributed digitalized ledger technology which enables legitimate and extremely secure transactions to take place by means of a point-to-point network. It was introduced in 2008 and brought into practical use in 2009 as the technology to use Bitcoins. Since then, blockchain has continued to gain popularity and has become increasingly useful in a lot of domains. After bitcoin, there have been many kinds of cryptocurrencies operating on a blockchain network. Along with having application in cryptocurrency, blockchain is also proving to be useful in areas such as governance, cybersecurity, industrial processes, financial sector, entertainment, etc.