To find an input whose binary hash value begins with 10 zeros you would have to try many potential combinations with each combination having a 1 / 2¹⁰ probability of being suitable. In other words, to find an input that gives a hash value beginning with 10 zeroes you would, on average, need to try 2¹⁰ inputs.

Links between documents can be created by connecting them using hashes to group them into blocks.

If you are able to create a secure ledger then you are able to transform this into a digital payment system by ensuring that:

• The ledger is amend only – it is immutable
• You can obtain the state of the ledger at any time