拉丁阵和幅相变换相结合的物理层加密传输算法

传统无线通信的安全性主要依赖于上层加密机制，无法保证调制方式等物理层信息的安全。针对此问题，本文从物理层信道的本质特性出发，基于混沌理论中的三维洛伦兹映射，提出了一种利用拉丁阵置乱星座点位置信息的物理层加密传输算法。算法充分利用星座调制复数空间特性，能获得比布尔代数域更大的密文和密钥空间，因此可获得更高安全性。从理论分析、NIST(National Institute of Standards and Technology)随机性测试、密钥空间、密钥敏感性、识别调制方式等方面考察了算法的安全性能。理论分析和仿真结果表明，所提算法在保证通信可靠性的前提下，能够有效增强通信的安全性。 

A Novel Physical Layer Encryption Algorithm Combined Latin Rectangle and Phase amplitude Mask

The security of traditional wireless communication mainly implemented in the upper layers, which cannot achieve the protection of the modulation type and physical layer information. However, wireless physical layer security exploits the physical characteristics of the wireless channel to achieve secure communications. An efficient physical layer encryption algorithm was proposed in this paper employing Latin rectangle based on 3D Lorenz map aiming to scramble the constellation map. The algorithm makes the most of the properties of modulation in complex field, which attains a lager secret key space than Boolean algebra field. We studied the security of the proposed algorithm in terms of theoretical analysis, randomness tests using NIST(National Institute of Standards and Technology), key space, key sensitivity and the recognition of modulation type. Compared to the existing physical layer cryptosystems, the proposed method achieves higher security with less calculation and the security of the proposed method is verified through different tests. Both theoretical analysis and simulation results show that on the premise of ensuring the reliability, the proposed method can enhance the system security effectively.