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Paper 2018/390
MILP-based Differential Attack on Round-reduced GIFT
Baoyu Zhu and Xiaoyang Dong and Hongbo Yu
Abstract
At Asiacrypt 2014, Sun et al. proposed a MILP model to search differential characteristics for bit-oriented block ciphers. In this paper, we improve this model to search differential characteristics of GIFT, a new lightweight block cipher proposed at CHES 2017. GIFT has two versions, namely GIFT-64 and GIFT-128. For GIFT-64, we find the best 12 rounds differential characteristic with our MILP-based model and give a key-recovery attack on 19 rounds GIFT-64. For GIFT-128, we find a 18 rounds differential characteristic and give the first attack on 23 rounds GIFT-128.
Metadata
- Available format(s)
- Publication info
- Preprint. MINOR revision.
- Keywords
- secret-key cryptography
- Contact author(s)
- zhuby16 @ mails tsinghua edu cn
- History
- 2019-06-06: last of 4 revisions
- 2018-05-01: received
- See all versions
- Short URL
- https://ia.cr/2018/390
- License
-
CC BY