What is block chain? I can't find any simple explanation

Blockchain is a shared immutable ledger for recording the history of transactions. A business blockchain, such as IBM Blockchain and the Linux Foundation’s Hyperledger Project, provides a permissioned network with known identities. And unlike Bitcoin, there is no need for cryptocurrency exchange.

https://ibm.com/blockchain/...

Glorified linked list

Just a distributed linked list nothing more :D but sounds cool so ppl buy it.

A buzzword

it's a decentralised list where everything whats done is written into, and everbody who is participating acknowledges that this did happen.

For example you're musician and your released songs, automaticly report to the blockchain. Bob plays your song 3 times. So everbody agrees that your song has been played 3 times and you should get a compensation from your national music rights association.

got it?

Chain og lego each with a unique id and a chip with information appended by last user

Its literally just this

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@Lucaa beat me to it. My manager was super impressed when she asked me about it and i was able to code a small example for her. I knew Data Structures and Algorithms would serve me well since the class was a literal mindfuck(to me at least)

Its Bitcoin

As simple as it gets.

Each block of info is hashed together with the id of the previous block and the previous hash.

This ensures that you cannot change a previous block without invalidating the hash as long as you have access to all previous blocks as you can always recalculate the hashes and see if you get the same as you already had as the head of the chain.

Everything else is extra stuff for the particular application or added security.

The previous id and hash is the chain part.

Thx everyone :)