计算机科学 ›› 2023, Vol. 50 ›› Issue (10): 377-382.doi: 10.11896/jsjkx.220800007
• 信息安全 • 上一篇
徐睿, 彭长根, 许德权
XU Rui, PENG Changgen, XU Dequan
摘要： 针对国密ZUC算法的认证加密的安全性、效率以及轻量化需求,提出了一种类自同步ZUC的关联数据认证加密方案ZUCAE。该方案通过改进祖冲之流密码算法(ZUC-256)的LFSR层算法,设计实现了一种类似自同步流密码的ZUC-SSL算法,利用该算法使密文参与到状态更新函数中,用于认证码的生成。ZUC-256算法进行消息加密,通过优化初始化模块,将关联数据嵌入到初始化过程中,实现了密钥流生成和加密并行进行,解密前进行消息认证,减少计算消耗时间,提高方案的安全性。安全性分析结果表明该算法能够抵抗当前主流的基于LFSR设计的流密码相关攻击,且类自同步流密码的设计能增强认证码的安全性。与AES-CGM和AEGIS的效率实验对比表明,在数据规模大的环境下,所提算法的效率高于AES-CGM,与AEGIS的效率相当,具备一定的实用性。
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