MCMix: Anonymous Messaging via Secure Multiparty Computation
MCMix: Anonymous Messaging via Secure Multiparty Computation
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发表时间：
2017-08
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通讯作者：
Nikolaos Alexopoulos;A. Kiayias;Riivo Talviste;T. Zacharias
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作者：
Nikolaos Alexopoulos;A. Kiayias;Riivo Talviste;T. Zacharias
我们提出了MCMix，一个匿名消息传递系统，完全隐藏通信元数据，可以扩展到数十万用户的顺序。我们的方法是隔离两个合适的功能，称为拨号和对话，当连续使用时，实现匿名消息传递。以此为出发点，我们应用安全多方计算（“MC”或MPC）并继续实现它们。然后，我们提出了一个实施方案，使用Sharemind，一个流行的MPC系统。我们的实现在延迟方面与以前的消息传递系统具有竞争力，这些系统只提供较弱的隐私保证。我们的解决方案可以通过不同的MPC实现以各种不同的方式实例化，总体上说明了MPC是如何成为匿名通信的混合网络和DC网络的可行和有竞争力的替代方案。
We present MCMix, an anonymous messaging system that completely hides communication metadata and can scale in the order of hundreds of thousands of users. Our approach is to isolate two suitable functionalities, called dialing and conversation, that when used in succession, realize anonymous messaging. With this as a starting point, we apply secure multiparty computation (“MC” or MPC) and proceed to realize them. We then present an implementation using Sharemind, a prevalent MPC system. Our implementation is competitive in terms of latency with previous messaging systems that only offer weaker privacy guarantees. Our solution can be instantiated in a variety of different ways with different MPC implementations, overall illustrating how MPC is a viable and competitive alternative to mix-nets and DC-nets for anonymous communication.