A131630 Consider the AES (or Rijndael) S-boxes and concatenate i and sbox[i] for all i. Then a(n) is the number of these pairs at Hamming distance n from 0, sbox[0].

1, 0, 0, 3, 7, 18, 41, 44, 34, 33, 40, 26, 6, 2, 1, 0, 0

Offset

0,4

Comments

The S-box takes as input one byte and outputs one byte. So we are concatenating an 8-bit i with the 8-bit output of sbox[i].

Links

Table of n, a(n) for n=0..16.

J. Alex Halderman, Seth D. Schoen, Nadia Heninger, William Clarkson, William Paul, Joseph A. Calandrino, Ariel J. Feldman, Jacob Appelbaum and Edward W. Felten, Lest We Remember: Cold Boot Attacks on Encryption Keys, 2008.

Wikipedia, Rijndael S-box

Crossrefs

Cf. A131620.

Sequence in context: A076700 A265007 A026533 * A305652 A356938 A208771

Adjacent sequences: A131627 A131628 A131629 * A131631 A131632 A131633

Keyword

nonn,fini,full

Author

Nadia Heninger, May 28 2008

Status

approved