Blockchain Blocks: A Hash of the Block


In addition to a set of records, we also have a hash of the block.

As you may remember hashing one-way mathematical algorithm used to map arbitrary data (often called the "message") to a bit string of a fixed size, otherwise known as a hash.

The hash of a block can be thought of as a digital fingerprint, and whenever a new block is created, a hash or digital fingerprint of all of the data within the block is generated too.

Now it's important to note that even a slight change to the input data of a hashing algorithm, would result in a drastic change to the output hash. This means that if someone was able to make even a slight change to the set of records stored within our block, the hash of the entire block would change.

As we’ll come to learn, this is a fundamental aspect to the secure nature of the blockchain.

In partnership with TFBC

Take the full course, for free!

Recognised and co-certified by both the British CPD Service and the Dubai Blockchain Center, our new Fundamentals of Blockchain course is the perfect choice for anyone looking to learn more about this disuptive new approach to systems development.

Start learning