Ad Hoc网络是移动互联网、物联网的重要组成部分。由于其无中心自组织、数据交换需经多跳转发进行，传统密码学方法难以满足Ad Hoc网络保密传输需求。物理层安全技术可进行分布式、低运算量的无密钥安全通信，弥补密码学方法的不足，已引起了广泛关注。本项目聚焦基于物理层安全的Ad Hoc网络端到端保密传输机制研究。从构建端到端保密传输模型入手，揭示窃听者多维属性、干扰者多维属性、信道传播模型、数据转发协议等与端到端传输的本质关系，并在此基础上评估传输的安全中断、连接中断和安全容量性能等，确定影响端到端保密传输的关键要素。进一步，结合网络层路由策略，研究端到端的保密传输设计方法。针对不同业务需求差异大的实际情况，基于物理层安全研究高效高质的端到端保密传输。本项目为Ad Hoc网络的端到端保密传输机制设计提供了理论和实验基础。

Ad Hoc networks are important component of Mobile Internet and IoT. Since they are self-organized without central infrastructure and the data delivery is implemented by multi-hop relaying, it is hard for traditional cryptography methods to guarantee the secrecy transmission in Ad Hoc networks. Physical layer security can overcome the shortcomings of cryptography, has the advantage of low computational complexity and can be easily implemented in a distributed manner without secret key, thus it has been attracting lots of attentions. This project focuses on the study of physical layer security-based end-to-end (E2E) secrecy transmission mechanism in Ad Hoc networks. By exploring the essential relationships between the multi-dimensional attributes of eavesdroppers and jammers, channel propagation, data forwarding protocols and E2E transmission, we construct the E2E secrecy transmission model. Based on this, we evaluate the performance of transmission security, connection outage and secrecy capacity, determining the key factors that affect E2E secrecy transmission. By integrating routing strategies on the network layer, we further study the design methods for E2E secrecy transmission. Aiming to satisfy the various requirements of practical applications, we explore the highly efficient E2E secrecy transmission with physical layer security techniques. This project provides theoretical and experimental basis for the design of E2E secrecy transmission mechanisms in Ad Hoc networks.