Blockchain with Adjustable Proof-of-Work Consensus Mechanism for Mobile Devices

Nowadays, most of the major industries, such as healthcare, are losing millions of valuable data and information, and therefore, many of these major industries have implemented blockchain technology in order to save and secure their valuable data since blockchain's major feature is to store information in an immutable and permanent manner. Blockchain provides greater transparency, enhanced security, instant traceability, increased efficiency, and speed. Though when we talk about blockchain, it is mainly the mining of transactions that draws our attention and of course, mining thus consumes huge computational power. In this chapter, we have implemented a lightweight blockchain in smartphones. We have built a simple blockchain that can store the contents of any smartphone user and this lightweight blockchain can perform all the operations that a normal blockchain does, like the mining of transactions, updating the chain, and checking if there is any pending transaction. From our experimental study, we have observed that implementing blockchain in smartphones does consume a huge computational power, that is, the smartphone starts to heat up and the battery power decreases rapidly.