Blockchain Technology The blockchain is more like a digital ledger to store financial transactions just like a book that contains what comes in and what goes out. Unlike traditional ledger, the digital one is a lot more vast and secure with no intermediaries involved. In Blockchain, each block contains, but not limited to, a cryptographic hash of the previous block along with the transaction data. It can be used by two parties to record transactions in a secure and permanent way. It is managed by a peer-to-peer network and allows the safe transit of digital information.