{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the types of consensus mechanisms in blockchain and what are their characteristics?","a":"Proof of Work (PoW): PoW is a consensus mechanism used in cryptocurrencies such as Bitcoin. It requires miners to prove that they have done sufficient work by solving complex mathematical problems in order to receive block rewards. The characteristic of PoW is high decentralization, good security, but huge energy consumption and  increasing mining difficulty."}]}],"pr":"ccf55f7f1e31a4e554ec8076f6a4062040971f0746227b84dbee05c4c3b5745a"}