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- COCONUT98 abstract "In cryptography, COCONUT98 (Cipher Organized with Cute Operations and N-Universal Transformation) is a block cipher designed by Serge Vaudenay in 1998. It was one of the first concrete applications of Vaudenay's decorrelation theory, designed to be provably secure against differential cryptanalysis, linear cryptanalysis, and even certain types of undiscovered cryptanalytic attacks.The cipher uses a block size of 64 bits and a key size of 256 bits. Its basic structure is an 8-round Feistel network, but with an additional operation after the first 4 rounds, called a decorrelation module. This consists of a key-dependent affine transformation in the finite field GF(264). The round function makes use of modular multiplication and addition, bit rotation, XORs, and a single 8×24-bit S-box. The entries of the S-box are derived using the binary expansion of e as a source of "nothing up my sleeve numbers".Despite Vaudenay's proof of COCONUT98's security, in 1999 David Wagner developed the boomerang attack against it. This attack, however, requires both chosen plaintexts and adaptive chosen ciphertexts, so is largely theoretical. Then in 2002, Biham, et al. applied differential-linear cryptanalysis, a purely chosen-plaintext attack, to break the cipher. The same team has also developed what they call a related-key boomerang attack, which distinguishes COCONUT98 from random using one related-key adaptive chosen plaintext and ciphertext quartet under two keys.".
- COCONUT98 wikiPageID "9329898".
- COCONUT98 wikiPageLength "4891".
- COCONUT98 wikiPageOutDegree "30".
- COCONUT98 wikiPageRevisionID "544676721".
- COCONUT98 wikiPageWikiLink Adaptive_chosen-ciphertext_attack.
- COCONUT98 wikiPageWikiLink Affine_transformation.
- COCONUT98 wikiPageWikiLink Bit_rotation.
- COCONUT98 wikiPageWikiLink Bitwise_operation.
- COCONUT98 wikiPageWikiLink Block_cipher.
- COCONUT98 wikiPageWikiLink Block_size_(cryptography).
- COCONUT98 wikiPageWikiLink Boomerang_attack.
- COCONUT98 wikiPageWikiLink Category:Broken_block_ciphers.
- COCONUT98 wikiPageWikiLink Chosen-plaintext_attack.
- COCONUT98 wikiPageWikiLink Cryptography.
- COCONUT98 wikiPageWikiLink DFC_(cipher).
- COCONUT98 wikiPageWikiLink David_A._Wagner.
- COCONUT98 wikiPageWikiLink Decorrelation_theory.
- COCONUT98 wikiPageWikiLink Differential-linear_attack.
- COCONUT98 wikiPageWikiLink Differential-linear_cryptanalysis.
- COCONUT98 wikiPageWikiLink Differential_cryptanalysis.
- COCONUT98 wikiPageWikiLink E_(mathematical_constant).
- COCONUT98 wikiPageWikiLink Exclusive_or.
- COCONUT98 wikiPageWikiLink Feistel_cipher.
- COCONUT98 wikiPageWikiLink Finite_field.
- COCONUT98 wikiPageWikiLink Key_size.
- COCONUT98 wikiPageWikiLink Linear_cryptanalysis.
- COCONUT98 wikiPageWikiLink Modular_arithmetic.
- COCONUT98 wikiPageWikiLink Nothing_up_my_sleeve_number.
- COCONUT98 wikiPageWikiLink Provable_security.
- COCONUT98 wikiPageWikiLink Related-key_attack.
- COCONUT98 wikiPageWikiLink S-box.
- COCONUT98 wikiPageWikiLink Serge_Vaudenay.
- COCONUT98 wikiPageWikiLink Substitution_box.
- COCONUT98 wikiPageWikiLink XOR.
- COCONUT98 wikiPageWikiLinkText "COCONUT98".
- COCONUT98 wikiPageWikiLinkText "Coconut98".
- COCONUT98 blockSize "64".
- COCONUT98 cryptanalysis "The differential-linear attack by Biham, et al. uses 227.7 chosen plaintexts and about 233.7 work, and has a 75.5% success rate.".
- COCONUT98 cryptanalysis "Wagner's boomerang attack uses about 216 adaptively-chosen plaintexts and ciphertexts, about 238 work, and succeeds with probability 99.96%.".
- COCONUT98 designers Serge_Vaudenay.
- COCONUT98 hasPhotoCollection COCONUT98.
- COCONUT98 keySize "256".
- COCONUT98 name "COCONUT98".
- COCONUT98 publishDate "1998".
- COCONUT98 relatedTo DFC_(cipher).
- COCONUT98 rounds "8".
- COCONUT98 structure "Decorrelated Feistel cipher".
- COCONUT98 wikiPageUsesTemplate Template:Crypto-stub.
- COCONUT98 wikiPageUsesTemplate Template:Cryptography_navbox.
- COCONUT98 wikiPageUsesTemplate Template:Infobox_block_cipher.
- COCONUT98 wikiPageUsesTemplate Template:Reflist.
- COCONUT98 subject Category:Broken_block_ciphers.
- COCONUT98 hypernym Cipher.
- COCONUT98 type Algorithm.
- COCONUT98 comment "In cryptography, COCONUT98 (Cipher Organized with Cute Operations and N-Universal Transformation) is a block cipher designed by Serge Vaudenay in 1998. It was one of the first concrete applications of Vaudenay's decorrelation theory, designed to be provably secure against differential cryptanalysis, linear cryptanalysis, and even certain types of undiscovered cryptanalytic attacks.The cipher uses a block size of 64 bits and a key size of 256 bits.".
- COCONUT98 label "COCONUT98".
- COCONUT98 sameAs COCONUT98.
- COCONUT98 sameAs m.0284tjn.
- COCONUT98 sameAs Q3648824.
- COCONUT98 sameAs Q3648824.
- COCONUT98 wasDerivedFrom COCONUT98?oldid=544676721.
- COCONUT98 isPrimaryTopicOf COCONUT98.