IACR News item: 07 December 2014
Qianqian Yang, Lei Hu, Siwei Sun, Kexin Qiao, Ling Song, Jinyong Shan, Xiaoshuang Ma
ePrint Report
In CRYPTO 2014 Albrecht \\emph{et al.} brought in a 20-round iterative lightweight block
cipher PRIDE which is based on a good linear layer for achieving a
tradeoff between security and efficiency. A recent
analysis is presented by Zhao \\emph{et al.}. Inspired by their work, we use an
automatic search method to find out 56 iterative differential characteristics of PRIDE, containing 24
1-round iterative characteristics, based on three of them we construct a 15-round differential and perform a differential attack on the 19-round PRIDE, with data,
time and memory
complexity of $2^{62}$, $2^{63}$ and $2^{71}$ respectively.
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