Babylon：重用比特币挖矿以增强权益证明安全性
Babylon: Reusing Bitcoin Mining to Enhance Proof-of-Stake Security
摘要：
比特币是世界上最安全的区块链，由其工作量证明矿工的巨大哈希能力支持，但消耗大量能源。权益证明链是节能的，具有快速的终结性和问责制，但面临着几个基本的安全问题：易受不可削减的远程安全攻击，不可削减的交易审查和拖延攻击，以及难以从低代币估值引导新的PoS链。我们提出了巴比伦，一个区块链平台，它通过重用巨大的比特币哈希能力来提高PoS链的安全性，从而结合了两个世界的优点。Babylon提供数据可用的时间戳服务，通过允许他们在Babylon上为数据可用的块检查点、欺诈证据和审查交易打上时间戳来保护PoS链。Babylon矿工将矿机与比特币合并，因此该平台的额外能源成本为零。通过一个密码经济学安全性定理形式化了一个巴比伦增强的PoS协议的安全性，该安全性定理给出了可削减的安全性和活性保证。
英文摘要：
Bitcoin is the most secure blockchain in the world, supported by the immense hash power of its Proof-of-Work miners, but consumes huge amount of energy. Proof-of-Stake chains are energy-efficient, have fast finality and accountability, but face several fundamental security issues: susceptibility to non-slashable long-range safety attacks, non-slashable transaction censorship and stalling attacks and difficulty to bootstrap new PoS chains from low token valuation. We propose Babylon, a blockchain platform which combines the best of both worlds by reusing the immense Bitcoin hash power to enhance the security of PoS chains. Babylon provides a data-available timestamping service, securing PoS chains by allowing them to timestamp data-available block checkpoints, fraud proofs and censored transactions on Babylon. Babylon miners merge mine with Bitcoin and thus the platform has zero additional energy cost. The security of a Babylon-enhanced PoS protocol is formalized by a cryptoeconomic security theorem which shows slashable safety and liveness guarantees.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
