Easy-to-Implement Two-Server based Anonymous Communication with Simulation Security

Easy-to-Implement Two-Server based Anonymous Communication with Simulation Security
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易于实现基于两个服务器的具有模拟安全性的匿名通信

DOI:
10.1145/3488932.3523264
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发表时间:
2022
期刊:
2022 ACM on Asia Conference on Computer and Communications Security
影响因子:
--
通讯作者:
Jiang, Wei
Jiang, Wei
中科院分区:
--
文献类型:
--
作者:
Bowers, Adam;Du, Jize;Lin, Dan;Jiang, Wei

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匿名通信是安全的端到端且不可链接的,通过防止服务提供商使用消息元数据发现任何两个用户之间的通信链接,在保护用户隐私方面发挥着关键作用。可以利用Mix-net、DC-net、时间延迟、覆盖流量、安全多方计算(SMC)和私有信息检索等技术来实现匿名通信。基于SMC的方法通常提供更强的基于模拟的安全保证。在本文中,我们提出了一种简单而新颖的 SMC 方法来建立匿名通信,可以使用两个仅具有通信和存储相关功能的非共谋服务器轻松实现。我们的方法提供了针对恶意对手的更强大的安全保证,而不会产生大量额外的计算。为了展示其实用性,我们使用 Chameleon Cloud 实施我们的解决方案来模拟一百万用户之间的交互,并进行广泛的模拟以显示不同组规模的消息延迟。我们的方法对于较小的组规模和子组通信非常有效,同时保持消息完整性。而且,它不存在消息冲突问题。
Anonymous communication, that is secure end-to-end and unlinkable, plays a critical role in protecting user privacy by preventing service providers from using message metadata to discover communication links between any two users. Techniques, such as Mix-net, DC-net, time delay, cover traffic, Secure Multiparty Computation (SMC) and Private Information Retrieval, can be used to achieve anonymous communication. SMC-based approach generally offers stronger simulation based security guarantee. In this paper, we propose a simple and novel SMC approach to establishing anonymous communication, easily implementable with two non-colluding servers which have only communication and storage related capabilities. Our approach offers stronger security guarantee against malicious adversaries without incurring a great deal of extra computation. To show its practicality, we implemented our solutions using Chameleon Cloud to simulate the interactions among a million users, and extensive simulations were conducted to show message latency with various group sizes. Our approach is efficient for smaller group sizes and sub-group communication while preserving message integrity. Also, it does not have the message collision problem.
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