【Author】
Meiklejohn, Sarah; Pomarole, Marjori; Jordan, Grant; Levchenko, Kirill; Mccoy, Damon; Voelker, Geoffrey M.; Savage, Stefan
【Source】COMMUNICATIONS OF THE ACM
【Abstract】Bitcoin is a purely online virtual currency, unbacked by either physical commodities or sovereign obligation; instead, it relies on a combination of cryptographic protection and a peer-to-peer protocol for witnessing settlements. Consequently, Bitcoin has the unintuitive property that while the ownership of money is implicitly anonymous, its flow is globally visible. In this paper we explore this unique characteristic further, using heuristic clustering to group Bitcoin wallets based on evidence of shared authority, and then using re-identification attacks (i. e., empirical purchasing of goods and services) to classify the operators of those clusters. From this analysis, we consider the challenges for those seeking to use Bitcoin for criminal or fraudulent purposes at scale.
【摘要】比特币是一种纯粹的在线虚拟货币，没有实物商品或主权债务的支持;相反，它依靠密码保护和点对点协议的组合来见证和解。因此，比特币具有一种不可直观的特性，即虽然货币的所有权是隐性匿名的，但其流动却是全球可见的。在本文中，我们进一步探索了这一独特特征，使用启发式聚类来基于共享权限的证据对比特币钱包进行分组，然后使用重新识别攻击(即经验购买商品和服务)来对这些集群的经营者进行分类。从这一分析中，我们考虑了那些寻求大规模使用比特币进行犯罪或欺诈目的的挑战。
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