Evidence of Work (PoW): In this particular protocol, the new node has to solve a cryptographic puzzle. It includes finding a nonce corresponding to a hash according to the community’s criteria. The primary node to complete the puzzle joins the community. This protocol is Utilized in Bitcoin and Ethereum 1.028. https://energy-supplier-liaison06059.blog-a-story.com/13630413/energy-cost-management-no-further-a-mystery