WBZUC:novel white-box ZUC-128 stream cipher  

作　　者：Yang Yatao Zhang Ruoqing Dong hui Ma Yingjie Zhang Xiaowei 

机构地区：[1]Department of Electronic and Communication Engineering,Beijing Electronic Science and Technology Institute,Beijing 100070,China [2]School of Telecommunication Engineering,Xidian University,Xi'an 710071,China [3]Hong Kong Applied Science and Technology Research Institute,Hong Kong 999077,China

出　　处：《The Journal of China Universities of Posts and Telecommunications》2023年第2期96-106,共11页中国邮电高校学报（英文版）

基　　金：supported by the Beijing Natural Science Foundation(4232034);the Fundamental Research Funds for the Central Universities(328202222);the“Communication Engineering”and“Electronic Information Engineering”National First-Class Undergraduate Major Construction Project。

摘　　要：White-box cryptography is critical in a communication system to protect the secret key from being disclosed in a cryptographic algorithm code implementation.The stream cipher is a main dataflow encryption approach in mobile communication.However,research work on white-box cryptographic implementation for stream cipher is rare.A new white-box Zu Chongzhi-128(ZUC-128)cryptographic implementation algorithm named WBZUC was proposed.WBZUC adopts lookup table and random coding in the non-linear function to make the intermediate value chaotic without changing the final encryption result.Thus,the WBZUC algorithm’s security gets improved compared with the original ZUC-128 algorithm.As for the efficiency,a test experiment on WBZUC shows that the average speed of key generation,encryption,and decryption can reach at 33.74 kbit/s,23.31 kbit/s,24.06 kbit/s respectively.Despite its running speed is relatively a bit lower than original ZUC-128 algorithm,WBZUC can provide better security and comprehensive performance in mobile communication system environment.

关 键 词：Zu Chongzhi-128(ZUC-128)algorithm white-box cryptography cryptographic implementation lookup table secure communication 

分 类 号：TN918.4[电子电信—通信与信息系统]