Search Results
| Search type | Search syntax |
|---|---|
| Tags | [tag] |
| Exact | "words here" |
| Author |
user:1234 user:me (yours) |
| Score |
score:3 (3+) score:0 (none) |
| Answers |
answers:3 (3+) answers:0 (none) isaccepted:yes hasaccepted:no inquestion:1234 |
| Views | views:250 |
| Code | code:"if (foo != bar)" |
| Sections |
title:apples body:"apples oranges" |
| URL | url:"*.example.com" |
| Saves | in:saves |
| Status |
closed:yes duplicate:no migrated:no wiki:no |
| Types |
is:question is:answer |
| Exclude |
-[tag] -apples |
| For more details on advanced search visit our help page | |
Results tagged with spn
Search options answers only
not deleted
user 12016
A Substitution-Permutation-Network is a structure that has been used to create a number of different block ciphers (e.g., AES, Picollo, Present...)
2
votes
Definition Problem for toy SPN
Definition 3.1 : Let $\pi_S:\{0,1\}^m\rightarrow \{0,1\}^n$ be a S-box. Consider an (ordered) pair of bitstrings of length $m$, say $(x,x^*)$. We say that input XOR of the S-box is $x\oplus x^*$ and …
- 23.7k
1
vote
Heys Differential Cryptanalysis Question
So to attack those keys you need to create high probability input differences confined to $S_{41}$ and $S_{43}$.
Taking the same input differences as in Heys for $S_{42}$ and $S_{43}$ and working back …
- 23.7k
1
vote
Differential analysis of SPN
The reason $R=n-1$ (or $R=1,$ applied to the decryption mapping) is used is the following. All the individual differential approximations as well as the differential trail which is chosen over the $R$ …
- 23.7k
2
votes
Would there be any advantage in combining Feistel network and substitution-permutation netwo...
Check out their references as well, but as far as I can tell the previous work they refer to as Hybrid schemes do not mix SPN and Feistel.
Reference:
C. P. Arya, R. Ratan and N. … Verma, Secure Hybrid Encryption Scheme based on SPN and Feistel Structures, Advances and Applications in Mathematical Sciences Volume 21, Issue 3, January 2022, Pages 1287-1301. …
- 23.7k
4
votes
Accepted
modified substitution permutation networks
So, the mixing of the $n$ keys is at most as secure as having a uniformly distributed single key. If your key randomness is not strong, doing this kind of mixing can make the key distribution nearer t …
- 23.7k
1
vote
Python code for linear and differential cryptanalysis
I am not a python expert or even user. So caveat emptor (buyer beware). But have a look at https://pypi.org/project/cryptanalysis/
It seems to use a random Sbox and a random Pbox but you should be abl …
- 23.7k