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Results tagged with aes
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user 44603
AES (Advanced Encryption Standard) is a symmetrical block-cipher algorithm with a 128-bit block size, and key sizes of 128, 192 or 256 bits.
7
votes
1
answer
338
views
AES s-box representation
I have seen in various papers like in this one page 4, that the AES s-box equation is:
$S=A \circ φ^{-1}(φ(x)^{254})$ where $φ$ is the isomorphism from $\mathbb{F}_2^{8}$ to $\mathbb{F}_{2^{8}}$ with … its basis and the reduction polynomial and $A$ is the affine transformation defined in AES. …
- 391
5
votes
2
answers
1k
views
What is the meaning of Maximum Expected Differential/Linear Probability (MEDP/MELP)?
(is various AES MEDP,MELP papers)
Is there a particular reason why they choose only 2 rounds, or it's just matter of computational complexity? …
- 391
3
votes
0
answers
73
views
Does this approach on MEDP take into account the multiple differential trails?
I was reading this (chapter 3.1) paper, and the author proposed this method to calculate the MEDP on 2-round AES:
I cannot fully understand what he is doing but it seems like it iterating over all possible …
- 391
8
votes
1
answer
1k
views
How 2 rounds in AES achieve full diffusion?
I have read somewhere that 2 rounds is AES provide full diffusion. So I looked it up to find out what it exactly meant. …
- 391