论文标题
巴比伦：重复使用比特币采矿以增强证明安全性
Babylon: Reusing Bitcoin Mining to Enhance Proof-of-Stake Security
论文作者
论文摘要
比特币是世界上最安全的区块链，得到了工作证明矿工的巨大哈希功率的支持，但消耗了大量的能量。验证链条具有节能性，具有快速的终结性和问责制，但是面临几个基本的安全问题：易感性的远程安全攻击，不可扣除的交易审查和失速攻击以及难以引导来自低标记估值的新POS链。我们提出了一个区块链平台Babylon，它通过重复使用巨大的比特币哈希功率来增强POS链的安全性，结合了两全其美。巴比伦提供了可获取数据的时间戳服务，并通过允许POS链来确保POS链，使它们能够在巴比伦上使用时间戳数据可用的块检查站，欺诈和审查的交易。巴比伦矿工与比特币合并，因此该平台的额外能源成本为零。巴比伦增强的POS协议的安全性是由加密经济的安全定理正式制定的，该定理显示出了可靠的安全性和livesice保证。
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.
