POSTER: I Don't Want That Content! On the Risks of Exploiting Bitcoin's Blockchain as a Content Store
POSTER: I Don't Want That Content! On the Risks of Exploiting Bitcoin's Blockchain as a Content Store
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DOI：
10.1145/2976749.2989059
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发表时间：
2016-10
期刊：
影响因子：
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通讯作者：
Roman Matzutt;O. Hohlfeld;Martin Henze;Robin Rawiel;J. H. Ziegeldorf;Klaus Wehrle
中科院分区：
文献类型：
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作者：
Roman Matzutt;O. Hohlfeld;Martin Henze;Robin Rawiel;J. H. Ziegeldorf;Klaus Wehrle
比特币彻底改变了数字货币，其底层区块链已成功应用于其他领域。为了能够被每个参与的对等体验证，区块链将每个交易都保存在一个持久的、分布式的、防篡改的日志中，每个参与者都需要在本地复制。虽然这构成了区块链技术的核心创新，因此是一种理想的属性，但它也可能以对整个系统有害的方式被滥用。我们为比特币展示了区块链可能提供多种方式来存储（恶意和非法）内容，这些内容一旦存储，就无法删除，并且每个参与用户都可以复制。我们研究了比特币区块链中内容存储的演变，对存储的内容进行了分类，并强调了允许在全球复制的区块链中存储任意数据的影响。
Bitcoin has revolutionized digital currencies and its underlying blockchain has been successfully applied to other domains. To be verifiable by every participating peer, the blockchain maintains every transaction in a persistent, distributed, and tamper-proof log that every participant needs to replicate locally. While this constitutes the central innovation of blockchain technology and is thus a desired property, it can also be abused in ways that are harmful to the overall system. We show for Bitcoin that blockchains potentially provide multiple ways to store (malicious and illegal) content that, once stored, cannot be removed and is replicated by every participating user. We study the evolution of content storage in Bitcoin's blockchain, classify the stored content, and highlight implications of allowing the storage of arbitrary data in globally replicated blockchains.