Anirban Ghatak, Kaushik Sarkar, Anupam Chattopadhyay, Ambrish Awasthi, Indivar Gupta · 2026 · Research Square
DOI: 10.21203/rs.3.rs-9706347/v1 · cited by 0 works (OpenAlex) · open-access PDF
电流加密器Espresso是由E. Dubrova和M. Hell设计的,作为5G安全的硬件高效候选人。它有两个组件 - 一个256位的二进制非线性反馈转移注册表(NFSR),具有14个反馈键,以及一个20个变量的非线性输出功能。然而,Espresso的安全性在几个标准的加密分析攻击方面是通过使用替代的NFSR估计的,其中只有两个反馈键。上述分析是基于声称这种替代的NFSR是使用一种转换算法获得的,它保留了原来的NFSR的输出序列。
Machine translation (Meta M2M100); the English original follows.
The stream cipher Espresso was designed by E. Dubrova and M. Hell as a hardware-efficient candidate for 5G security. It has two components - a 256-bit binary non-linear feedback shift register (NFSR), with 14 feedback taps, and a 20-variable non-linear output function. However, the security of Espresso with regard to several standard cryptanalytic attacks are estimated using an alternate NFSR, which has only two feedback taps. The above analysis is based on the claim that this alternate NFSR is obtained using a transformation algorithm which preserves the output sequence of the original NFSR.
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Topics: Linear feedback shift register, Arithmetic, Shift register, Transformation (genetics), Computer science, Stream cipher
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