Attackers would have to exert immense efforts in order to change information written on the blockchain, as the data would need to be manipulated on all blocks in the network and the blocks would then need to be re-validated. In addition, due to the decentralised network, a system failure of one node can be compensated by other nodes in the network. Blockchain technology can therefore offer a more secure alternative to traditional centralised network arrangements. However, its security is highly dependent on correct set-up, as discussed further.