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