【Author】
Kappos, George; Yousaf, Haaroon; Maller, Mary; Meiklejohn, Sarah
【Source】PROCEEDINGS OF THE 27TH USENIX SECURITY SYMPOSIUM
【Abstract】Among the now numerous alternative cryptocurrencies derived from Bitcoin, Zcash is often touted as the one with the strongest anonymity guarantees, due to its basis in well-regarded cryptographic research. In this paper, we examine the extent to which anonymity is achieved in the deployed version of Zcash. We investigate all facets of anonymity in Zcash's transactions, ranging from its transparent transactions to the interactions with and within its main privacy feature, a shielded pool that acts as the anonymity set for users wishing to spend coins privately. We conclude that while it is possible to use Zcash in a private way, it is also possible to shrink its anonymity set considerably by developing simple heuristics based on identifiable patterns of usage.
【摘要】在目前从比特币衍生出来的众多替代加密货币中，大零币经常被吹捧为具有最强匿名保证的货币，这是因为它的基础是备受好评的加密研究。在本文中，我们考察了在大零币的部署版本中实现匿名的程度。我们调查了大零币交易中匿名性的所有方面，从透明交易到与主要隐私功能——一个屏蔽池的交互，该池为希望私下消费的用户设置了匿名性。我们的结论是，虽然可以以私有的方式使用零币，但也可以通过基于可识别的使用模式开发简单的启发式来大幅缩小其匿名设置。
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