Proof-Of-Stake for Blockchain Networks: Fundamentals, Challenges and Approaches - Hardcoverby Cong T. Nguyen (Editor), Dinh Thai Hoang (Editor), Diep N. Nguyen (Editor) A consensus mechanism is the core component of a blockchain network, which ensures that every participant agrees on the state of the network in trustless environments. Until now, current blockchain networks have been using the proof of work (PoW) consensus mechanism, which has serious limitations such as huge energy consumption, low transaction processing capabilities, and