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Efficient Search for Optimal Diffusion Layers of Generalized Feistel Networks
Diffusion Round Feistel Permutations
2019/5/23
The Feistel construction is one of the most studied ways of building block ciphers. Several generalizations were then proposed in the literature, leading to the Generalized Feistel Network, where the ...
Shuffle and Mix: On the Diffusion of Randomness in Threshold Implementations of Keccak
side-channel analysis threshold implementation uniformity
2018/11/13
Threshold Implementations are well-known as a provably firstorder secure Boolean masking scheme even in the presence of glitches. A precondition for their security proof is a uniform input distributio...
Study of the numerical simulation of tight sandstone gas molecular diffusion based on digital core technology
Tight sandstone gas Nano-CT Digital core Molecular diffusion Numerical simulation
2018/4/2
Diffusion is an important mass transfer mode of tight sandstone gas. Since nano-pores are extensively developed in the interior of tight sandstone, a considerable body of research indicates that the t...
Correction of source-rock permeability measurements owing to slip flow and Knudsen diffusion: a method and its evaluation
Shale gas Permeability Knudsen diffusion Unconventional reservoir Source rock
2018/4/2
Source-rock permeability is a key parameter that controls the gas production rate from unconventional reservoirs. Measured source-rock permeability in the laboratory, however, is not an intrinsic prop...
Hydrogen diffusion in the apatite-water system: Fluorapatite parallel to the c-axis
apatite hydrogen diffusion H-D exchange H2O SIMS
2017/4/10
Many studies in the past decade have sought to explore the origin and evolution of water in planetary bodies based on
the hydrogen isotopic compositions of apatite. However, no investigation has stud...
A meteoroid penetrating the Earth’s atmosphere leaves behind a trail
of dense plasma embedded in the lower E/upper D-region ionosphere. While
radar measurements of meteor trail evolution have been c...
Division Cryptanalysis of Block Ciphers with a Binary Diffusion Layer
Skinny block cipher Midori block cipher MILP
2017/3/6
In this paper, we propose an accurate security evaluation methodology for block ciphers with a binary diffusion layers against division cryptanalysis. We illustrate the division property by the indepe...
Design of Lightweight Linear Diffusion Layers from Near-MDS Matrices
lightweight cryptography diffusion layer near-MDS matrix
2017/3/6
Near-MDS matrices provide better trade-offs between security and efficiency compared to constructions based on MDS matrices, which are favored for hardware-oriented designs. We present new designs of ...
Lightweight Diffusion Layer: Importance of Toeplitz Matrices
Toeplitz matrix MDS matrix XOR count
2016/12/10
MDS matrices are used as building blocks of diffusion layers in block
ciphers, and XOR count is a metric that estimates the hardware implementation cost.
In this paper we report the minimum value of...
Direct Construction of Lightweight Rotational-XOR MDS Diffusion Layers
Lightweight Cryptography MDS Diffusion Layers Bit-wise Circulant Matrices
2016/12/7
As a core component of Substitution-Permutation Networks, diffusion layer is mainly introduced by matrices from maximum distance separable (MDS) codes. Surprisingly, up to now, most constructions of M...
LIGHT DIFFUSION IN THE TROPICAL DRY FOREST OF COSTA RICA
Leaf area index spectral vegetation indices MODIS
2016/11/30
Leaf Area Index (LAI) has been defined as the total leaf area (one-sided) in relation to the ground. LAI has an impact on tree growth and recruitment through the interception of light, which in turn a...
Patterning Barriers to Lateral Diffusion in Supported Lipid Bilayer Membranes by Blotting and Stamping
Patterning Barriers Lateral Diffusion Lipid Bilayer Membranes Blotting Stamping
2016/5/23
Two new methods are introduced for patterning fluid lipid bilayer membranes on solid supports. These methods are based on the observation that supported membranes undergo self-limiting lateral expansi...
Sulfuric acid recovery from titanium white (pigment) waste liquor using diffusion dialysis with a new series of anion exchange membranes—static runs
Ion exchange membrane Diffusion dialysis Titanium white waste liquor Poly(2,6-dimethyl-1,4-phenylene oxide)
2016/3/25
In this paper, a new series of anion exchange membranes have been produced from linear engineering plastics poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) by conducting the processes of bromination, chl...
Diffusion layers are crucial components of symmetric
ciphers. These components, along with suitable
Sboxes, can make symmetric ciphers resistant against statistical
attacks like linear and differen...
Enhancing Estimation for Interest Rate Diffusion Models with Bond Prices
Interest Rate Models Affine Term Structure Bond Prices Market Price of Risk Combined Estimation Parameter Estimation
2016/1/26
We consider improving estimating parameters of diffusion processes for interest rates by incorporating information in bond prices. This is designed to improve the estimation of the drift parameters, w...