%0 Journal Article
%A 杨亚涛
%T WBZUC: novel white-box ZUC-128 stream cipher
%D 2023
%R 10.19682/j.cnki.1005-8885.2022.0022
%J 中国邮电高校学报（英文）
%P 96-106
%V 30
%N 2
%X <div style="text-align:justify;">
	White-box cryptography is critical in a communication system to protect the secret key from being disclosed in a&nbsp;cryptographic algorithm code implementation. The stream cipher is a main dataflow encryption approach in mobile communication. However, the research work about white-box cryptographic implementation for stream cipher is rare. A new white-box Zu Chongzhi-128 (ZUC-128) cryptographic implementation algorithm named WBZUC was&nbsp;proposed. WBZUC adopts lookup table and random coding in the non-linear function to make the intermediate value chaos 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 average speed&nbsp;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 relative a bit lower than original ZUC-128 algorithm, WBZUC can provide better security and comprehensive performance in mobile communication system environment.
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%U https://jcupt.bupt.edu.cn/CN/10.19682/j.cnki.1005-8885.2022.0022