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. 2020 Mar 23;10(3):183. doi: 10.3390/brainsci10030183

Figure 2.

Figure 2

Summary of basic blockchain methodology. When transactions are made that need to be stored in the chain. nodes compete to find a “nonce” that satisfies the hash-problem assigned to them. If the data is valid, the successful node creates a block, which is chained to the most recently created block in the longest chain.