数据采集与处理Issue(3)：694-702,9.DOI:10.16337/j.1004-9037.2015.03.026
N-CDMA安全架构抗攻击性研究与改进
Attack-Resistance and Enhancement on Security Framework of N-CDMA
摘要
Abstract
Analyzed the channel structure ,it is found that there is an inherent signal feature on the plain‐text in N‐CDMA system .A new ciphertext‐only attack method is proposed to solve the initial phase of the key sequence by eavesdropping 20 ms ciphertext frame .By exploiting the linear relations between the key sequence and the state of the long code generator ,an algorithm for decoding the private mask is pro‐posed .It is proved that the voice encryption of N‐CDMA system is unsecure while attacked by ciphertext‐only attack .Aiming at the safety defect of IS‐95 system and possible attack methods ,a new enhancement scheme is proposed to improve the security framework of IS‐95 system .关键词
信息安全/密码分析/唯密文攻击/窄带码分多址/私人掩码Key words
information security/cryptanalysis/ciphertext-only attack/N-CDMA/private mask分类
信息技术与安全科学引用本文复制引用
陈德宏,刘晓东,刘梅..N-CDMA安全架构抗攻击性研究与改进[J].数据采集与处理,2015,(3):694-702,9.基金项目
国家自然科学基金（61304066）资助项目。 （）
