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Security of Related-Key Differential Attacks on TWINE, Revisited
Kosei SAKAMOTO Kazuhiko MINEMATSU Nao SHIBATA Maki SHIGERI Hiroyasu KUBO Yuki FUNABIKI Takanori ISOBE
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2020/01/01
Online ISSN: 1745-1337
Type of Manuscript: Special Section LETTER (Special Section on Cryptography and Information Security)
block cipher, related-key security, active sbox, MILP,
Full Text: PDF(143.9KB)>>
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.