Sublime

A block is a collection of records, like a record of transaction. 

Blocks have limits, so they can only have so many transactions in them. When the blocks are full, we add them to the network by mining them. 

A hashing function outputs a hash when you put something into it. Bitcoin uses the SHA-256 hashing function. 

With hashing fun

Being the first piece of data, Data 1 does not contain any hash reference. When new data arrive, they are put together with the hash reference that points to Data 1.

computational power required to solve problems ratchets up as the hashing power of the network grows. It’s as if a country managed its gold standard by randomly destroying gold mines every time a more efficient mining process was invented.

Modèle d’origine des blockchains, celle du Bitcoin est publique : n’importe qui peut la télécharger, examiner toutes les transactions (via le site blockchain.info par exemple, qui fait défiler tous les blocs validés en direct), devenir un nœud, c’est-à-dire un membre du réseau, et tenter de miner un bloc en utilisant la puissance de calcul de son o