Related-key impossible-differential attack on reduced-round Skinny. (English) Zbl 1521.94024
Gollmann, Dieter (ed.) et al., Applied cryptography and network security. 15th international conference, ACNS 2017, Kanazawa, Japan, July 10–12, 2017. Proceedings. Cham: Springer. Lect. Notes Comput. Sci. 10355, 208-228 (2017).
Summary: At CRYPTO’16 [Lect. Notes Comput. Sci. 9815, 123–153 (2016; Zbl 1372.94412)], C. Beierle et al. presented SKINNY, a family of lightweight tweakable block ciphers intended to compete with the NSA designs SIMON and SPECK. SKINNY can be implemented efficiently in both soft- and hardware and supports block sizes of 64 and 128 bits as well as tweakey sizes of 64, 128, 192 and 128, 256, 384 bits respectively. This paper presents a related-tweakey impossible-differential attack on up to 23 (out of 36) rounds of SKINNY-64/128 for different tweak sizes. All our attacks can be trivially extended to SKINNY-128/128.
For the entire collection see [Zbl 1366.94005].
For the entire collection see [Zbl 1366.94005].
MSC:
| 94A60 | Cryptography |
Keywords:
symmetric cryptography; cryptanalysis; tweakable block cipher; impossible differential; lightweight cryptographyCitations:
Zbl 1372.94412References:
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