We propose EFPIX (Encrypted Flood Protocol for Information eXchange), a flood-based relay communication protocol that achieves end-to-end encryption, plausible deniability for users, and untraceable messages while hiding metadata, such as sender and receiver, from those not involved. It also has built-in spam resistance and multiple optional enhancements. It can be used in privacy-critical communication, infrastructure-loss scenarios, space/research/military communication, where central servers are infeasible, or general-purpose messaging.

翻译：我们提出了EFPIX（信息交换加密泛洪协议），这是一种基于泛洪的中继通信协议，实现了端到端加密、用户的可否认性以及消息的不可追踪性，同时向非参与方隐藏了诸如发送者和接收者等元数据。该协议还内置了抗垃圾邮件机制和多种可选增强功能。它可用于隐私关键通信、基础设施丢失场景、空间/研究/军事通信（其中中心服务器不可行）或通用消息传递。