• A hash value is included in each block of the blockchain. The hash value serves as a link to the block that came before it, as well as transaction data and a time stamp.
• A block is a digital safe that stores and locks information indefinitely. The data put to a certain block is immutable, which means it cannot be changed or erased. Each block of data is linked to previous blocks of data, and the block hierarchy cannot be altered unless 51 percent of blockchain participants agree to one or both of the changes.
• A automated algorithm is used to calculate the information in the block. This algorithm converts a transaction or piece of information into a string of letters and numbers up to 64 digits long. The Hash function is the name for this calculation.

Read More: What are the different types of Blockchains?