How blockchain data is stored and secured
What is hashing?
What is a Merkle Tree?
If the hashing process is repeated with exactly the same transactions, exactly the same hashes will be created. This allows anyone using the blockchain to check that the data has not been tampered with, because ANY change in any part of the data will result in a completely different hash, affecting every iteration of hashes all the way to the root. This is known as a Merkle Tree.
Merkle Trees serve the purpose of significantly reducing the amount of data required to be stored and transmitted or broadcast over the network by summarising sets of hashed transactions into a single root hash. As each transaction is hashed, then combined and hashed again, the final root hash will still be a standard size.
Understand how Facebook leveraged specific aspects of blockchain technology to launch a new cyrptocurrency called Libra, and its potential impact on the banking and finance sector.
Understand the process to authenticate and authorise a transaction
Many people wrongly conflate the two. Make sure you know the difference
Understand the three main risks associated with public blockchains
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