Chapter 4  Blockchains

So quickly, before we get lost in the blockchain rabbit hole, what is the difference between a regular database and the blockchain?


Collects info together in groups.

These groups are “blocks”.

Each block holds a set of information

Each block has “storage capacity”. When these are filled, then the block is closed

Once the block is closed, it’s linked to the previously filled blocks

This forms a chain of data, the blockchain


Data is stored in “tables” not blocks

This data then makes an irreversible timeline of data

This means unlike blocks, new data cannot become a part of the timeline

Blocks are given timestamps when added to the chain, a database is not like this

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