Improved Integral Analysis on Lightweight Block Cipher Midori
Yanjun Li, Mengya Wang, Haiwen Ou, Shubei Wang · 2019
As a dual cryptanalysis corresponding to differential analysis, integral cryptanalysis is more effective than differential and linear analyses in analyzing of some structures and algorithms. A new integral distinguisher for Midori is proposed in this paper by using saturating technology and combining the characteristics of the linear diffusion layer of Midori. The number of active bytes taken by our integral distinguisher is less than the number of active bytes of the distinguisher constructed by automatically searching. Furthermore, it is attacked parity bytes of key combining with the characteristic of the key schedule. To sum up, the integral analysis in this paper is the optimal integral analysis at present.