A gentle introduction to immutability of blockchains

In the context of data security, the immutability of data stored on blockchains is important. What do people mean when they say “Blockchains are immutable”? In this post I try to explain the key concepts.

It may be useful to read introductions to blockchains and Bitcoin if you have just arrived here or are unfamiliar with them.

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Inside Bitcoin’s blockchain

I’m often asked what’s in a blockchain, so I put this infographic together as an aide memoire using bitcoin’s blockchain as the example.

Although other blockchains will have differences, the overall structures should be similar.

bitcoin_blockchain_infographicInfographic designed by fractalphia.com

This is also available in French produced by BitConseil.

Print a poster

Click here for a higher resolution version that is a great size and shape to print out on A3 and stick on your wall as a quick reference!