ISSN 1000-1239 CN 11-1777/TP

计算机研究与发展 ›› 2021, Vol. 58 ›› Issue (11): 2444-2455.doi: 10.7544/issn1000-1239.2021.20210615

所属专题: 2021密码学与网络空间安全治理专题

• 信息安全 • 上一篇    下一篇

基于SCMA的端信息扩展多用户安全通信系统研究

石乐义1,2,兰茹1,段鹏飞1,韩强2   

  1. 1(中国石油大学(华东)海洋与空间信息学院 山东青岛 266580);2(中国石油大学(华东)计算机科学与技术学院 山东青岛 266580) (shileyi@upc.edu.cn)
  • 出版日期: 2021-11-01
  • 基金资助: 
    国家自然科学基金项目(61772551);山东省自然科学基金项目(ZR2019MF034)

End Spreading Multi-User Secure Communication System Based on SCMA

Shi Leyi1,2, Lan Ru1, Duan Pengfei1, Han Qiang2   

  1. 1(College of Oceanography and Space Informatics, China University of Petroleum, Qingdao, Shandong 266580);2(College of Computer Science and Technology, China University of Petroleum, Qingdao, Shandong 266580)
  • Online: 2021-11-01
  • Supported by: 
    This work was supported by the National Natural Science Foundation of China (61772551) and the Natural Science Foundation of Shandong Province (ZR2019MF034).

摘要: 端信息扩展技术使用多项端信息组成的扩展序列来表示身份信息,各项端信息与所传递的数据本身无关,从而隐藏用户的真实信息.然而,端信息扩展序列资源利用率低、自相关性弱,无法实现多用户并发安全通信.对此,将稀疏码多址接入(sparse code multiple access, SCMA)技术引入端信息扩展序列生成过程中,提出基于SCMA的端信息扩展多用户安全通信系统模型,详细阐述了模型中的码本设计分配、码字加载发送策略.进一步,从安全性能和通信服务质量2方面对原型系统进行理论分析和实验验证.实验结果表明:基于SCMA的端信息扩展多用户安全通信系统可实现用户信息的隐蔽传输,服务器端能够正确区分用户信息.采用稀疏编码后,系统具有较低误比特率,且在一定过载条件下,仍具有良好的传输性能.

关键词: 稀疏码多址接入, 端信息扩展技术, 网络安全, 资源利用率, 多用户通信

Abstract: End spreading technology uses a sequence of multiple end information to represent the identity information, and each piece of end information was irrelevant to the information it conveys. Thus it can hide the real information of the user. However, the end spreading sequence has the problems of low resource utilization, poor autocorrelation and unable to realize secure communication among multiple users. The sparse code multiple access (SCMA) technology is introduced into the generation process of end spreading sequence, establish the system model of end spreading multi-user secure communication system based on SCMA, and elaborating on the codebook design allocation strategy and code-word loading and sending strategy designed in the model. After that, the prototype system is analyzed and experimentally verified from two aspects of security capability and quality of communication service. The experiment result shows that, end spreading multi-user secure communication system based on SCMA realizes the covert transmission of user information, and the receiver can correctly distinguish user information. With sparse coding, the system has a low error rate and good transmission performance under certain overload conditions.

Key words: sparse code multiple access (SCMA), end spreading technology, network security, resource utilization rate, multi-user communication

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