AES

Creator

Creator

Seonglae Cho

Created

Created

2020 Jun 21 6:42

Editor

Editor

Seonglae Cho

Edited

Edited

2024 Apr 23 8:19

Refs

Refs

Advanced Encryption Standard, Rijndael

128-bit (16 bytes) block size

Operates on 16 bytes in 4x4 column-major grid

128-, 192-, or 256-bit key size

For long data symmetric

There are even specific hardware accelerators for this AES algorithm

10(or 12 or 14) rounds of substitution, permutation and add round key (XOR)

SubBytes for Confusion

ShiftRows for Diffusion

MixColumns for Diffusion with
Finited Field

AddRoundKey for Confusion

Decryption works in reverse order

AES Variants

Rijndael (AES) S-Box

Only for SubBytes

Create S-Box based on

Column major grid

Data structure to manipulate while AES process

notion image

notion image

Won from crypto competition (2001)

Crypto competitions: AES: the Advanced Encryption Standard

The goal of the Advanced Encryption Standard (AES) competition was to specify "an unclassified, publicly disclosed encryption algorithm capable of protecting sensitive government information well into the next century". The AES competition was organized by the United States National Institute of Standards and Technology (NIST).

https://competitions.cr.yp.to/aes.html

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