AI 中文总结
OmniSphinx主动混合网络格式可在单次部署中模拟其他混合格式，其模拟Sphinx格式的开销仅为计算时间增约90μs、头部增33%，解决了混合网络分组格式互不兼容的问题。
AI 中文摘要
混合网络是实现匿名通信的重要工具，不仅保护消息内容，还保护消息元数据。长期以来，人们提出了多种混合网络的分组格式，通常仅针对单一特定目标设计，这些格式互不兼容，需单独设置软件和基础设施。本文提出一种新格式OmniSphinx以解决该问题：发送方在分组中嵌入决定处理方式的代码，形成的主动混合网络可在单次部署中模拟任何其他混合格式。实证评估显示，对于典型混合网络用例，OmniSphinx的模拟相较于原生执行仅产生合理开销：对于最紧凑的Sphinx格式，计算时间增加约90μs，头部大小增加33%。
英文摘要
Mix networks are an important tool to implement anonymous communication, which protects not just the content but also the metadata of messages. Over time, various packet formats for mix networks have been proposed, usually with single, specific goals in mind. These formats are incompatible with each other, requiring separate software and infrastructure to be set up. In this paper, we propose a new format, OmniSphinx, which solves this issue. In OmniSphinx, senders embed code in their packets that determines how they must be processed. The resulting active mix network can emulate any other mix format within a single deployment. Our empirical evaluation shows that emulation in OmniSphinx incurs reasonable overhead compared to native execution for typical mix network use cases: For Sphinx, the most compact format, computation time increases by around 90μs, while headers increase by 33% in size.
