基于最小信息泄漏的线性随机化实现物理层安全传输

Linear randomization with lowest information leakage for physical layer secure transmission

为设计实用物理层安全传输机制,给出了线性随机化预处理模型。该模型指出,基于无线信道的特征差异,恰当地设计加性和乘性随机化模块可以为合法用户提供信道优势。从信息理论安全角度论证了加性随机化权值和乘性随机化权值具有最小信息泄漏时应满足的最佳分布。最后提出一种随机子载波参考安全传输机制对乘性随机化权值的优化设计进行了实例化分析。

Linear randomization pre-processing framework was presented to design feasible physical layer secure trans- mission schemes. The framework show that, based on characteristic differentiae of wireless channels, additive and multi- plicative randomization modules with suitable design would create channel advantage for legitimate users. In the view point of information theory security, the optimal distributions of the additive randomization weights and the multiplica- tive randomization weights to induce the lowest information leakage to the eavesdropper were verified. Finally, A random sub-carrier refereiacing security scheme was proposed as an instantiation analysis for the optimization design of multipli- cative randomization weights.