New answers tagged

0 votes

Generalizing AES s-box circular shifts in bigger GF

There something misleading in Wikipedia article. They wrote: $s = b \oplus (b <<< 1) \oplus (b <<< 2) \oplus (b <<< 3) \oplus (b <<< 4)$ Is equal to: $s = b \times ...
user avatar
  • 795
2 votes

Generalizing AES s-box circular shifts in bigger GF

I calculated the matrix from the Wikipedia article and independently calculated the xor-rotation sequence from the matrix. The matrix I calculated matches the Wikipedia article ...
user avatar
2 votes
Accepted

Generalizing AES s-box circular shifts in bigger GF

OK the left vs right shift issue has to do with if the variable is represented by "big-endian" or "little-endian" convention, i.e., if the Least Significant Bit is on the left or ...
user avatar
  • 16.1k
0 votes

AES with other SBoxes

There is a nice tool, SBox Generator, which generates SBoxes and inverses from a given irreducible polynomial. GF($2^8$) has 30 so-called characteristic polynomials. Rijndael authors simply took the ...
user avatar

Top 50 recent answers are included