论文标题
$σ$ -LFSR的应用在键依赖的反馈配置中，用于单词为导向的流密码
The application of $σ$-LFSR in Key-Dependent Feedback Configuration for Word-Oriented Stream Ciphers
论文作者
论文摘要
在本文中，我们提出并评估了一种以$σ$ -LFSRS生成密钥依赖反馈配置（KDFC）的方法。具有此类配置的$σ$ -LFSR可以应用于使用基于单词的LFSR的任何流密码。在这里，配置生成算法使用秘密密钥（K）和初始化向量（IV）来生成反馈配置。我们已经数学分析了该方法生成的反馈配置。作为测试案例，我们已将这种方法应用于Snow 2.0，并研究了其对各种攻击的抵抗力的影响。此外，我们还测试了生成的键流的随机性，并简要描述了其实现以及相同的挑战。
In this paper, we propose and evaluate a method for generating key-dependent feedback configurations (KDFC) for $σ$-LFSRs. $σ$-LFSRs with such configurations can be applied to any stream cipher that uses a word-based LFSR. Here, a configuration generation algorithm uses the secret key(K) and the initialization vector (IV) to generate a feedback configuration. We have mathematically analysed the feedback configurations generated by this method. As a test case, we have applied this method on SNOW 2.0 and have studied its impact on resistance to various attacks. Further, we have also tested the generated keystream for randomness and have briefly described its implementation and the challenges involved in the same.
