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Proof-of-Stake vs Proof-of-Work: Which Is More Sustainable? As blockchain technology continues to evolve, the debate surrounding the sustainability of different consensus mechanisms has gained significant attention. The two leading systems in question are Proof-of-Work (PoW) and Proof-of-Stake (PoS). Each consensus model serves as the backbone of different blockchain networks, ensuring security, verification, and decentralization. However, their environmental impacts, energy consumption, and scalability differ drastically, raising the question— which is more sustainable. Understanding Proof-of-Work (PoW) Proof-of-work is the original consensus mechanism, first introduced with Bitcoin in 2009. It requires miners to solve complex cryptographic puzzles to validate transactions and add them to the blockchain. The first to solve the puzzle is rewarded with cryptocurrency, incentivizing continuous competition among miners. However, this competition comes with a massive energy requirement. Sp...

Stanford University professor David Tsè said his team’s research had revealed a security property between Bitcoin and proof-of-stake protocols. Less than a year after proof- of- stake (PoS) became the consensus mechanism for the Ethereum blockchain — the industry’s largest blockchain network — researchers have found that PoS can complement Bitcoin.  Stanford University professor David Tsè spoke to Cointelegraph at the 2023 Bitcoin Builders conference in Miami, Florida, about his team’s findings on Bitcoin, PoS, security and energy consumption.  Cointelegraph reporter Joe Hall and Stanford University professor David Tsè at Bitcoin Builders 2023. Source: Cointelegraph Tsè facilitates a research lab specializing in blockchain consensus protocols at Stanford University in California. He said the first consensus protocol it looked into was Bitcoin’s  proof- of-work (PoW) protocol. “Bitcoin was like our first love,” he said. Through this “deep understanding” of Bitcoin and then an unders...