Each transaction is recorded as a data block when it occurs. These transactions indicate the movement of an asset, which can be tangible (a product) or intangible (intellectual). The data block can save the information you choose. It is possible to track many details such as who, what, when, where, how much and even the instant status of a food shipment. Each block connects to the ones before and after it. These blocks form a data chain as an asset moves from one place to another or ownership changes hands. The blocks confirm the exact time and order of transactions. In addition, the blocks are securely interconnected to prevent any blocks from being replaced or placing a block between two existing blocks. Transactions are blocked together in an irreversible chain. Each additional block strengthens the verification of the previous block and therefore the entire blockchain. This makes the blockchain distinctly reliable against hacking. In this way, it eliminates the possibility of entering the system by a malicious person. It also creates a ledger of transactions that you and other network members can trust.