论文标题
SOK：桥下的水：跨链桥黑客的评论
SoK: Not Quite Water Under the Bridge: Review of Cross-Chain Bridge Hacks
论文作者
论文摘要
区块链生态系统已演变为一个多链世界，各种区块链争夺使用。尽管每个区块链可能都有自己的本地加密货币或数字资产，但有一些用例可以在区块链之间传输这些资产。将这些数字资产跨越区块链带来的系统称为桥梁，并已成为生态系统的重要部分。桥梁的设计各不相同，范围从相当原始到极其复杂。但是，它们通常包括智能合约持有和释放数字资产，以及有助于促进链之间用户互动的节点。在本文中，我们首先提供了桥梁中组件的高水平分解以及某些桥梁设计的不同过程。为此，我们确定与桥梁组件相关的风险。然后，我们分析了专门针对桥梁的区块链生态系统中的过去漏洞。
The blockchain ecosystem has evolved into a multi-chain world with various blockchains vying for use. Although each blockchain may have its own native cryptocurrency or digital assets, there are use cases to transfer these assets between blockchains. Systems that bring these digital assets across blockchains are called bridges, and have become important parts of the ecosystem. The designs of bridges vary and range from quite primitive to extremely complex. However, they typically consist of smart contracts holding and releasing digital assets, as well as nodes that help facilitate user interactions between chains. In this paper, we first provide a high level breakdown of components in a bridge and the different processes for some bridge designs. In doing this, we identify risks associated with bridge components. Then we analyse past exploits in the blockchain ecosystem that specifically targeted bridges.
