If you are someone, who used to think , Bitcoin’s consensus mechanism i.e Proof Of Work (PoW) came into existence in late 2000s along with bitcoin , you are not alone! Preview: Bitcoin is a decentralized digital currency harnessing the core principles of blockchain technology. Its decentralized nature gives rise to various questions such as: a. How bitcoin transactions are validated? b. How to tackle double spending attack in a decentralized system? c. Who will validate the transactional reco...