On the Optimal Diffusion Layers with Practical Security against Differential and Linear Cryptanalysis

2000 ◽  
pp. 38-52
Author(s):  
Ju-Sung Kang ◽  
Choonsik Park ◽  
Sangjin Lee ◽  
Jong-In Lim
Keyword(s):  
Linear Cryptanalysis ◽  
Diffusion Layers ◽  
Practical Security

scholarly journals Design of Lightweight Linear Diffusion Layers from Near-MDS Matrices

2017 ◽  
pp. 129-155 ◽  
Author(s):  
Chaoyun Li ◽  
Qingju Wang
Keyword(s):  
Finite Fields ◽  
Lower Bounds ◽  
Hadamard Matrices ◽  
Circulant Matrices ◽  
Linear Cryptanalysis ◽  
Implementation Cost ◽  
Linear Diffusion ◽  
Diffusion Layers ◽  
Nonlinear Layer ◽  
Trade Offs

Near-MDS matrices provide better trade-offs between security and efficiency compared to constructions based on MDS matrices, which are favored for hardwareoriented designs. We present new designs of lightweight linear diffusion layers by constructing lightweight near-MDS matrices. Firstly generic n×n near-MDS circulant matrices are found for 5 ≤ n ≤9. Secondly, the implementation cost of instantiations of the generic near-MDS matrices is examined. Surprisingly, for n = 7, 8, it turns out that some proposed near-MDS circulant matrices of order n have the lowest XOR count among all near-MDS matrices of the same order. Further, for n = 5, 6, we present near-MDS matrices of order n having the lowest XOR count as well. The proposed matrices, together with previous construction of order less than five, lead to solutions of n×n near-MDS matrices with the lowest XOR count over finite fields F2m for 2 ≤ n ≤ 8 and 4 ≤ m ≤ 2048. Moreover, we present some involutory near-MDS matrices of order 8 constructed from Hadamard matrices. Lastly, the security of the proposed linear layers is studied by calculating lower bounds on the number of active S-boxes. It is shown that our linear layers with a well-chosen nonlinear layer can provide sufficient security against differential and linear cryptanalysis.

Practical Security against Differential and Linear Cryptanalysis for SMS4-like Cipher

2013 ◽  
Vol 8 (8) ◽  
Author(s):  
Qiu-Yan Wang ◽  
Bin Zhang ◽  
Chen-Hui Jin
Keyword(s):  
Linear Cryptanalysis ◽  
Practical Security

scholarly journals A Strategy for Constructing Fast Round Functions with Practical Security Against Differential and Linear Cryptanalysis

1999 ◽  
pp. 264-279 ◽  
Author(s):  
Masayuki Kanda ◽  
Youichi Takashima ◽  
Tsutomu Matsumoto ◽  
Kazumaro Aoki ◽  
Kazuo Ohta
Keyword(s):  
Linear Cryptanalysis ◽  
Practical Security

Results of Linear Cryptanalysis Using Linear Sieve Methods

2009 ◽  
Vol E92-A (5) ◽  
pp. 1347-1355
Author(s):  
Yukiyasu TSUNOO ◽  
Hiroki NAKASHIMA ◽  
Hiroyasu KUBO ◽  
Teruo SAITO ◽  
Takeshi KAWABATA
Keyword(s):  
Linear Cryptanalysis ◽  
Sieve Methods

Immunity of Lightweight DES Algorithm (DESL) Against Linear Cryptanalysis Attack

2019 ◽  
Vol 28 (1) ◽  
pp. 381-387
Author(s):  
Bassam Aboshsha ◽  
Mohamed Dessouky ◽  
Rabie Ramadan ◽  
Ayman EL-SAYED
Keyword(s):  
Linear Cryptanalysis

scholarly journals Effect of Gas Diffusion Layer Thickness on the Performance of Anion Exchange Membrane Fuel Cells

Processes ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 718
Author(s):  
Van Men Truong ◽  
Ngoc Bich Duong ◽  
Hsiharng Yang
Keyword(s):  
Water Management ◽  
Anion Exchange ◽  
Critical Role ◽  
Gas Diffusion ◽  
Anion Exchange Membrane ◽  
Cell Performance ◽  
Water Flooding ◽  
Diffusion Layer Thickness ◽  
Diffusion Layers ◽  
Exchange Membrane

Gas diffusion layers (GDLs) play a critical role in anion exchange membrane fuel cell (AEMFC) water management. In this work, the effect of GDL thickness on the cell performance of the AEMFC was experimentally investigated. Three GDLs with different thicknesses of 120, 260, and 310 µm (denoted as GDL-120, GDL-260, and GDL-310, respectively) were prepared and tested in a single H2/O2 AEMFC. The experimental results showed that the GDL-260 employed in both anode and cathode electrodes exhibited the best cell performance. There was a small difference in cell performance for GDL-260 and GDL-310, while water flooding was observed in the case of using GDL-120 operated at current densities greater than 1100 mA cm−2. In addition, it was found that the GDL thickness had more sensitivity to the AEMFC performance as used in the anode electrode rather than in the cathode electrode, indicating that water removal at the anode was more challenging than water supply at the cathode. The strategy of water management in the anode should be different from that in the cathode. These findings can provide a further understanding of the role of GDLs in the water management of AEMFCs.

Imaging of desaturation of the frozen gas diffusion layers by synchrotron X-ray radiography

2021 ◽  
Author(s):  
Yuzhou Zhang ◽  
Viral Hirpara ◽  
Virat Patel ◽  
Chen Li ◽  
Ryan Anderson ◽  
...  
Keyword(s):  
Gas Diffusion ◽  
Gas Diffusion Layers ◽  
X Ray ◽  
Diffusion Layers
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