Paper 2016/084
Truncated Differential Analysis of Round-Reduced RoadRunneR Block Cipher
Qianqian Yang, Lei Hu, Siwei Sun, and Ling Song
Abstract
RoadRunneR is a small and fast bitslice lightweight block cipher for low cost 8-bit processors proposed by Adnan Baysal and Sa ̈hap S ̧ahin in the LightSec 2015 conference. While most software efficient lightweight block ciphers lacking a security proof, RoadRunneR’s security is provable against differential and linear attacks. RoadRunneR is a Feistel structure block cipher with 64-bit block size. RoadRunneR-80 is a vision with 80-bit key and 10 rounds, and RoadRunneR-128 is a vision with 128-bit key and 12 rounds. In this paper, we obtain 5-round truncated differentials of RoadRunneR-80 and RoadRunneR-128 with probability 2^{−56}. Using the truncated differentials, we give a truncated differential attack on 7-round RoadRunneR-128 without whitening keys with data complexity of 2^{55} chosen plaintexts, time complexity of 2^{121} encryptions and memory complexity of 2^{68}. This is first known attack on RoadRunneR block cipher.
Metadata
- Available format(s)
-
PDF
- Category
- Secret-key cryptography
- Publication info
- Preprint. MINOR revision.
- Keywords
- LightweightBlock CipherRoadRunneRTruncated Differential Cryptanalysis
- Contact author(s)
- yangqianqian521 @ 126 com
- History
- 2016-01-31: received
- Short URL
- https://ia.cr/2016/084
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2016/084,
author = {Qianqian Yang and Lei Hu and Siwei Sun and Ling Song},
title = {Truncated Differential Analysis of Round-Reduced {RoadRunneR} Block Cipher},
howpublished = {Cryptology {ePrint} Archive, Paper 2016/084},
year = {2016},
url = {https://eprint.iacr.org/2016/084}
}