CAJ | 학술논문

文章在分析无线通信系统安全问题的基础上，结合LDPC编码纠错技术，提出一种基于超短波信道特征的密钥生成技术。首先，对基于无线信道特征的密钥生成技术进行了简要介绍。然后，对无线信道的互易性进行了分析。接下来，文章提出了基于LDPC的无线密钥生成方案设计，在方案中，将密钥生成分成了信道特征预估计、信道特征提取和协商纠错三个步骤。在信道特征预估计阶段，通信双方对信道特征进行大量测试获得其统计信道特征和特征频段；在信道特征提取阶段双方在特征频段提取初始信道特征，并对信道特征进行调制；在协商纠错阶段，通信双方构造LDPC的校验矩阵，使用校验矩阵对初始信道特征进行纠错，获得一致的信道特征，并生成密钥。最后根据窃听模型，对方案的安全性进行了分析。
문장재분석무선통신계통안전문제적기출상，결합LDPC편마규착기술，제출일충기우초단파신도특정적밀약생성기술。수선，대기우무선신도특정적밀약생성기술진행료간요개소。연후，대무선신도적호역성진행료분석。접하래，문장제출료기우LDPC적무선밀약생성방안설계，재방안중，장밀약생성분성료신도특정예고계、신도특정제취화협상규착삼개보취。재신도특정예고계계단，통신쌍방대신도특정진행대량측시획득기통계신도특정화특정빈단；재신도특정제취계단쌍방재특정빈단제취초시신도특정，병대신도특정진행조제；재협상규착계단，통신쌍방구조LDPC적교험구진，사용교험구진대초시신도특정진행규착，획득일치적신도특정，병생성밀약。최후근거절은모형，대방안적안전성진행료분석。
This paper analyzes the security issues of wireless communication system and proposes key generation technique based on LDPC error correction. Firstly, this paper introduces key generation based on wireless channel characteristics. Then, this paper analysis the radio channel reciprocity characteristics. Next, wireless key generation scheme based on LDPC is proposed. Key generation is divided into pre-estimate channel characteristics, characteristics extraction and negotiation correction. In the pre-estimate channel characteristics stage, communications parties test the channel characteristics. In the characteristics extraction stage, communications parties extract the initial channel characteristics from feature bands. In the negotiation correction stage, communications parties structure the check matrix. It corrects errors in the initial channel characteristics by check matrix. And then, it generates the key. Finally, this paper analysis security of scheme according to eavesdrop model.