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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". 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 RFC 5794: A Description of the ARIA Encryption Algorithm TLS/SSL RFC 6209: Addition of the ARIA Cipher Suites to Transport Layer Security (TLS) SRTP RFC 8269: The ARIA Algorithm and Its Use with the Secure Real-Time Transport Protocol (SRTP) Security 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. {{cite journal}}: Cite journal requires |journal= (help) Wenling Wu; Wentao Zhang; Dengguo Feng (2006). "Impossible Differential Cryptanalysis of ARIA and Camellia" (PDF). Retrieved January 19, 2007. {{cite journal}}: Cite journal requires |journal= (help) Xuehai Tang; Bing Sun; Ruilin Li; Chao Li (March 30, 2010). "A Meet-in-the-Middle Attack on ARIA" (PDF). Retrieved April 24, 2010. {{cite journal}}: Cite journal requires |journal= (help) References External links ARIA home Lazarus/Delphi port of ARIA. Discover the Aria Zhang popular books. Find the top 100 most popular Aria Zhang books.