Physical-Layer Secret Key Generation for Dual-Task Scenarios  

作　　者：Yang Lilin Li Guyue Guo Tao Xu Hao Hu Aiqun 

机构地区：[1]School of Cyber Science and Engineering,Southeast University,Nanjing 210096,China [2]Purple Mountain Laboratories,Nanjing 210096,China [3]Department of Electronic and Electrical Engineering,University College London,London WC1E 7JE,UK [4]National Mobile Communications Research Laboratory,Southeast University,Nanjing 210096,China

出　　处：《China Communications》2024年第7期252-266,共15页中国通信（英文版）

基　　金：supported in part by the National Key R&D Program of China(No.2022YFB2902202);in part by the Fundamental Research Funds for the Central Universities(No.2242023K30034);in part by the National Natural Science Foundation of China(No.62171121,U22A2001),in part by the National Natural Science Foundation of China(No.62301144);in part by the National Natural Science Foundation of Jiangsu Province,China(No.BK20211160);in part by the Southeast University Startup Fund(No.4009012301)。

摘　　要：Physical-layer secret key generation(PSKG)provides a lightweight way for group key(GK)sharing between wireless users in large-scale wireless networks.However,most of the existing works in this field consider only group communication.For a commonly dual-task scenario,where both GK and pairwise key(PK)are required,traditional methods are less suitable for direct extension.For the first time,we discover a security issue with traditional methods in dual-task scenarios,which has not previously been recognized.We propose an innovative segment-based key generation method to solve this security issue.We do not directly use PK exclusively to negotiate the GK as traditional methods.Instead,we generate GK and PK separately through segmentation which is the first solution to meet dual-task.We also perform security and rate analysis.It is demonstrated that our method is effective in solving this security issue from an information-theoretic perspective.The rate results of simulation are also consistent with the our rate derivation.

关 键 词：dual-task scenario information-theoretic security physical layer security secret group key generation 

分 类 号：TN918.4[电子电信—通信与信息系统]