Attacks and Enhancement on Security Architecture of IS-95

摘要：

　　Through analyze the structure of the channel,we find there is an inherent signal feature on the plaintext in IS-95 CDMA system.Based on it,a new ciphertext-only attack method is proposed,which can solve the initial phase of the key sequence by eavesdropping 20ms 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 proposed.Hence,the voice encryption of IS-95 system is provably unsecure against ciphertext-only attack.Direct against the safety defect of IS-95 system and possible attack methods,we propose a new enhancement scheme to improve the security architecture of IS-95 system.

关键词： cryptanalysis ciphertext-only attack IS-95 mask

作者: Dehong Chen Mei Liu Xiaodong Liu

作者单位: Institute of Electrical and Information Engineering, Anhui University of Technology, Maanshan, 243002, China

会议类型: 国际会议

会议名称: 2012 IEEE 14th International Conference on Communication Technology(2012年第十四届通信技术国际会议(ICCT 2012))

会议地点: 成都

会议语种:英文

页码: 1235-1240

在线出版日期: 2012-11-09（万方平台首次上网日期，不代表论文的发表时间）