ARIA (cipher)

This article is about the block cipher. For other uses, see ARIA (disambiguation).

ARIA
General
First published	2003
Derived from	AES
Certification	South Korean standard
Cipher detail
Key sizes	128, 192, or 256 bits
Block sizes	128 bits
Structure	Substitution-permutation network
Rounds	12, 14, or 16
Best public cryptanalysis
Meet-in-the-middle attack on 8 rounds with data complexity 2⁵⁶

In cryptography, ARIA is a block cipher designed in 2003 by a large group of South Korean researchers. In 2004, the Korean Agency for Technology and Standards selected it as a standard cryptographic technique.

The algorithm uses a substitution-permutation network structure based on AES. The interface is the same as AES: 128-bit block size with key size of 128, 192, or 256 bits. The number of rounds is 12, 14, or 16, depending on the key size. ARIA uses two 8×8-bit S-boxes and their inverses in alternate rounds; one of these is the Rijndael S-box.

The key schedule processes the key using a 3-round 256-bit Feistel cipher, with the binary expansion of 1/ $π$ as a source of "nothing up my sleeve numbers".

Standardization

KATS
- KS X 1213:2004
IETF
- Algorithm
  - RFC 5794: A Description of the ARIA Encryption Algorithm
- TLS/SSL
  - RFC 6209: Addition of the ARIA Cipher Suites to Transport Layer Security (TLS)

References

A. Biryukov; C. De Cannière; J. Lano; B. Preneel; S. B. Örs (January 7, 2004). "Security and Performance Analysis of ARIA" (PostScript). Version 1.2—Final Report. Katholieke Universiteit Leuven. Retrieved March 2, 2007.
Wenling Wu; Wentao Zhang; Dengguo Feng (2006). "Impossible Differential Cryptanalysis of ARIA and Camellia" (PDF). Retrieved January 19, 2007.
Xuehai Tang; Bing Sun; Ruilin Li; Chao Li (March 30, 2010). "A Meet-in-the-Middle Attack on ARIA" (PDF). Retrieved April 24, 2010.

External links

Block ciphers (security summary)

Common algorithms	AES Blowfish DES (Internal Mechanics, Triple DES) Serpent Twofish

Less common algorithms	Camellia CAST-128 IDEA RC2 RC5 RC6 SEED ARIA Skipjack TEA XTEA

Other algorithms	3-Way Akelarre Anubis BaseKing BassOmatic BATON BEAR and LION CAST-256 Chiasmus CIKS-1 CIPHERUNICORN-A CIPHERUNICORN-E CLEFIA CMEA Cobra COCONUT98 Crab Cryptomeria/C2 CRYPTON CS-Cipher DEAL DES-X DFC E2 FEAL FEA-M FROG G-DES GOST Grand Cru Hasty Pudding cipher Hierocrypt ICE IDEA NXT Intel Cascade Cipher Iraqi KASUMI KeeLoq KHAZAD Khufu and Khafre KN-Cipher Kuznyechik Ladder-DES Libelle LOKI (97, 89/91) Lucifer M6 M8 MacGuffin Madryga MAGENTA MARS Mercy MESH MISTY1 MMB MULTI2 MultiSwap New Data Seal NewDES Nimbus NOEKEON NUSH PRESENT Prince Q RC6 REDOC Red Pike S-1 SAFER SAVILLE SC2000 SHACAL SHARK Simon SM4 Speck Spectr-H64 Square SXAL/MBAL Threefish Treyfer UES Xenon xmx XXTEA Zodiac

Design	Feistel network Key schedule Lai-Massey scheme Product cipher S-box P-box SPN Avalanche effect Block size Key size Key whitening (Whitening transformation)

Attack (cryptanalysis)	Brute-force (EFF DES cracker) MITM (Biclique attack, 3-subset MITM attack) Linear (Piling-up lemma) Differential (Impossible Truncated Higher-order) Differential-linear Distinguishing (Known-key) Integral/Square Boomerang Mod n Related-key Slide Rotational Timing XSL Interpolation Partitioning Davies' Rebound Weak key Tau Chi-square Time/memory/data tradeoff

Standardization	AES process CRYPTREC NESSIE

Utilization	Initialization vector Mode of operation Padding

Cryptography

History of cryptography Cryptanalysis Outline of cryptography

Symmetric-key algorithm Block cipher Stream cipher Public-key cryptography Cryptographic hash function Message authentication code Random numbers Steganography

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