Security of Related-Key Differential Attacks on TWINE, Revisited

Security of Related-Key Differential Attacks on TWINE, Revisited

In this paper, we revisit related-key security of TWINE block cipher with 80-bit and 128-bit keys. Using an MILP-aided automatic search algorithm, we point out the previous evaluation of TWINE with a 80-bit key is wrong, and give a corrected evaluation result. Besides, we show a first security evalu...

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Veröffentlicht in:IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences Communications and Computer Sciences, 2020/01/01, Vol.E103.A(1), pp.212-214
Hauptverfasser: SAKAMOTO, Kosei, MINEMATSU, Kazuhiko, SHIBATA, Nao, SHIGERI, Maki, KUBO, Hiroyasu, FUNABIKI, Yuki, ISOBE, Takanori
Format: Artikel
Sprache:eng
Schlagworte:
active sbox
block cipher
Encryption
MILP
related-key security
Search algorithms
Security
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Beschreibung
Zusammenfassung:In this paper, we revisit related-key security of TWINE block cipher with 80-bit and 128-bit keys. Using an MILP-aided automatic search algorithm, we point out the previous evaluation of TWINE with a 80-bit key is wrong, and give a corrected evaluation result. Besides, we show a first security evaluation of TWINE with a 128-bit key in the related-key setting, which was infeasible due to the high computation cost in the original proposal.
ISSN:0916-8508
1745-1337
DOI:10.1587/transfun.2019CIL0004