Tag
diffusion
- Dec 26, 2025 Diffusion and Branch Numbers in Block Cipher Design How the wide-trail strategy counts active S-boxes across rounds, why a branch number of five bounds a four-round characteristic, and where the bound stops applying. cryptography
- Dec 25, 2023 ARX Ciphers: Carry Chains as the Only Nonlinearity Why modular addition provides nonlinearity in add-rotate-xor designs, how carries propagate as a probabilistic process, and why diffusion is measured in bits. cryptography
- Aug 9, 2023 The AES State Matrix: Byte Ordering, ShiftRows, and MixColumns How sixteen key bytes map onto a four-by-four matrix, why the row shift moves different distances, and what MixColumns does to a column as a polynomial. cryptography
- Sep 13, 2022 Subsurface Scattering and the Diffusion Approximation How multiple scattering inside a translucent medium turns a BRDF into a spatial integral, what the reduced scattering coefficient measures, and where the dipole solution stops applying. computer graphics