基于物理层密钥的消息加密和认证机制.  

Message encryption and authentication mechanism based on wireless physical layer key

作　　者：李兴志 金梁[1] 钟州[1] 楼洋明[1] LI Xingzhi;JIN Liang;ZHONG Zhou;LOU Yangming(National Digital Switching System Engineering ＆ Technological R＆D Center,Zhengzhou 450002,China)

机构地区：[1]国家数字交换系统工程技术研究中心,河南郑州450002

出　　处：《网络与信息安全学报》2018年第8期31-38,共8页Chinese Journal of Network and Information Security

基　　金：国家自然科学基金资助项目(No.61601514)~~

摘　　要：针对传统高层消息认证存在密钥泄露隐患、物理层消息认证无法防止被动窃听的问题,提出一种基于无线物理层特征的消息加密和认证机制。通过提取无线信道特征生成物理层密钥,并与身份密钥结合生成种子密钥;随后根据提取的种子通过密钥流生成器产生密钥流对消息进行加解密,对传输数据的私密性进行保护;最后接收方通过CRC校验结果对接收消息的真实性、完整性进行认证。仿真结果表明,该方法在防止被动窃听和主动攻击上具有更好的性能,密钥流随机性显著提高,认证漏检率降低约12。In order to solve the problem of hidden key leakage in traditional high-level message authentication and passive eavesdropping in physical layer message authentication, a message encryption and authentication mecha-nism based on the characteristics of wireless physical layer was proposed. By extracting the characteristics of the wireless channel, the physical layer key was generated and the seed key was generated by combining the identity key. The key stream generator then generated the key stream to decrypt the message according to the extracted seed, pro-tects the privacy of the transmitted data, and the final receiver authenticated the authenticity and integrity of the re-ceived message through the CRC verification result. Simulation results show that the proposed method has better performance in preventing passive eavesdropping and active attack, and the randomness of key stream is greatly im-proved and the rate of authentication leak detection is reduced by half.

关 键 词：物理层密钥 CRC校验 流密码 消息认证 

分 类 号：TN918[电子电信—通信与信息系统]