NDSS 2025 – Alba: The Dawn Of Scalable Bridges For Blockchains
好的，我现在需要帮用户总结一篇关于区块链安全的文章，控制在100字以内。首先，我得仔细阅读文章内容，抓住主要信息。
文章的标题是“Alba: The Dawn of Scalable Bridges for Blockchains”，作者来自TU Wien和普林斯顿大学。他们讨论了区块链桥接技术的现状和问题。现有的桥接协议要么传输过多信息，要么计算成本高，无法高效支持去信任的交易。
接着，文章提出了Pay2Chain桥接的概念，利用支付通道等链下解决方案的优势，克服现有桥接的限制。他们设计了一个名为Alba的桥接系统，能够高效、安全地执行基于链下事件的条件支付或智能合约。Alba不仅技术上高效，还能丰富源区块链的生态系统，支持DeFi应用和多资产支付通道。
此外，文章还进行了安全性分析和可扩展性评估，证明了Alba在通信复杂度和链上成本方面的效率。
总结时要突出Alba解决了现有桥接的问题，并介绍了它的优势和应用场景。控制在100字以内，直接描述内容。
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本文介绍了一种名为Alba的新一代可扩展区块链桥接技术Pay2Chain。该技术通过利用链下支付通道的优势,克服了现有信任桥梁效率低下的问题,实现了基于链下事件的安全高效交易。Alba支持去中心化金融应用、多资产支付通道等创新场景,并经过严格的安全性和可扩展性验证,展现了显著的成本优势。
2026-2-1 16:0:0
Author: securityboulevard.com(查看原文)
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Alba: The Dawn of Scalable Bridges for Blockchains
Over the past decade, cryptocurrencies have garnered attention from academia and industry alike, fostering a diverse blockchain ecosystem and novel applications. The inception of bridges improved interoperability, enabling asset transfers across different blockchains to capitalize on their unique features. Despite their surge in popularity and the emergence of Decentralized Finance (DeFi), trustless bridge protocols remain inefficient, either relaying too much information (e.g., light-client-based bridges) or demanding expensive computation (e.g., zk-based bridges). These inefficiencies arise because existing bridges securely prove a transaction’s on-chain inclusion on another blockchain. Yet this is unnecessary as off-chain solutions, like payment and state channels, permit safe transactions without on-chain publication. However, existing bridges do not support the verification of off-chain payments. This paper fills this gap by introducing the concept of Pay2Chain bridges that leverage the advantages of off-chain solutions like payment channels to overcome current bridges’ limitations. Our proposed Pay2Chain bridge, named Alba, facilitates the efficient, secure, and trustless execution of conditional payments or smart contracts on a target blockchain based on off-chain events. Alba, besides its technical advantages, enriches the source blockchain’s ecosystem by facilitating DeFi applications, multi-asset payment channels, and optimistic stateful off-chain computation. We formalize the security of Alba against Byzantine adversaries in the UC framework and complement it with a game theoretic analysis. We further introduce formal scalability metrics to demonstrate Alba’s efficiency. Our empirical evaluation confirms Alba’s efficiency in terms of communication complexity and on-chain costs, with its optimistic case incurring only twice the cost of a standard Ethereum transaction of token ownership transfer.
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The Network and Distributed System Security Symposium (NDSS) fosters information exchange among researchers and practitioners of network and distributed system security. The target audience includes those interested in practical aspects of network and distributed system security, with a focus on actual system design and implementation. A major goal is to encourage and enable the Internet community to apply, deploy, and advance the state of available security technologies.
