ARIA (cipher)

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Block cipher

title: "ARIA (cipher)" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["block-ciphers", "standards-of-south-korea"] description: "Block cipher" topic_path: "technology/cryptography" source: "https://en.wikipedia.org/wiki/ARIA_(cipher)" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Block cipher ::

::data[format=table title="Infobox block cipher"]

FieldValue
nameARIA
publish date2003
derived fromAES
certificationSouth Korean standard
key size128, 192, or 256 bits
block size128 bits
structureSubstitution–permutation network
rounds12, 14, or 16
cryptanalysisMeet-in-the-middle attack on 8 rounds with data complexity 256
::

| name = ARIA | designers = | publish date = 2003 | derived from = AES | derived to = | related to = | certification = South Korean standard | key size = 128, 192, or 256 bits | block size = 128 bits | structure = Substitution–permutation network | rounds = 12, 14, or 16 | 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/ as a source of "nothing up my sleeve numbers".

Implementations

The reference source code of ARIA cipher implemented in C, C++, and Java can be downloaded from KISA's cryptography use activation webpage.

Standardization

  • KATS
    • KS X 1213:2004
  • IETF
    • Algorithm
      • : A Description of the ARIA Encryption Algorithm
    • TLS/SSL
      • : Addition of the ARIA Cipher Suites to Transport Layer Security (TLS)
    • SRTP
      • : The ARIA Algorithm and Its Use with the Secure Real-Time Transport Protocol (SRTP)

Security

  • {{cite report | author = A. Biryukov | author2 = C. De Cannière | author3 = J. Lano | author4 = B. Preneel | author4-link = Bart Preneel | author5 = S. B. Örs | author-link = Alex Biryukov | title = Security and Performance Analysis of ARIA | version = Version 1.2—Final Report | publisher = Katholieke Universiteit Leuven | date = January 7, 2004 | url = https://www.esat.kuleuven.be/cosic/publications/article-500.pdf | format = PDF | access-date = 2024-05-28}}
  • {{cite journal | author1=Wenling Wu | author2=Wentao Zhang | author3=Dengguo Feng | title = Impossible Differential Cryptanalysis of ARIA and Camellia | year = 2006 | url = http://eprint.iacr.org/2006/350 | journal = Cryptology ePrint Archive | access-date = January 19, 2007}}
  • {{cite journal | author1=Xuehai Tang | author2=Bing Sun | author3=Ruilin Li | author4=Chao Li | title = A Meet-in-the-Middle Attack on ARIA | date = March 30, 2010 | url = http://eprint.iacr.org/2010/168 | journal = Cryptology ePrint Archive | access-date = April 24, 2010}}

References

References

  1. "KISA: Block Cipher: ARIA".
  2. (2003). "Information Security and Cryptology - ICISC 2003". Springer International Publishing.
  3. "KISA: Cryptographic algorithm source code: ARIA".

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block-ciphersstandards-of-south-korea