Related-key Impossible Differential Analysis of Full Khudra

Qianqian Yang; Lei Hu; Siwei Sun; Ling Song

Paper 2015/840

Related-key Impossible Differential Analysis of Full Khudra

Qianqian Yang, Lei Hu, Siwei Sun, and Ling Song

Abstract

Khudra is a 18-round lightweight block cipher proposed by Souvik Kolay and Debdeep Mukhopadhyay in the SPACE 2014 conference which is applicable to Field Programmable Gate Arrays (FPGAs). In this paper, we obtain $2^{16}$ 14-round related-key impossible differentials of Khudra, and based on these related-key impossible differentials for 32 related keys, we launch an attack on the full Khudra with data complexity of $2^{63}$ related-key chosen-plaintexts, time complexity of about $2^{68.46}$ encryptions and memory complexity of $2^{64}$ .

Metadata

Available format(s): PDF
Category: Secret-key cryptography
Publication info: Preprint. MINOR revision.
Keywords: Lightweight Block Cipher Khudra Related-key Impossible Differential Cryptanalysis
Contact author(s): yangqianqian521 @ 126 com
History: 2015-08-31: received
Short URL: https://ia.cr/2015/840
License: CC BY

BibTeX

@misc{cryptoeprint:2015/840,
      author = {Qianqian Yang and Lei Hu and Siwei Sun and Ling Song},
      title = {Related-key Impossible Differential Analysis of Full Khudra},
      howpublished = {Cryptology {ePrint} Archive, Paper 2015/840},
      year = {2015},
      url = {https://eprint.iacr.org/2015/840}
}