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| Differential Characteristic Probability of Added Key on Modulo 2n Operation |
| Zheng Bin; Guan Jie |
| Electronic Technology Institute, Information Engineering University, Zhengzhou 450004, China |
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Abstract Added key on modulo 2n operation－Y=X+Kmod2n is a code link which is often used in cipher algorithms, as SAFER++, RC6, Phelix and so on. In this paper, the Y=X+Kmod2n is analyzed with differential cryptanalysis. And the characters of structure, counting formulas of input and output differences and the keys is given for the first time, when the differential probability is to be 1, 1-1/2n-2, 1/2n-2, 1/2.
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Received: 03 November 2008
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2009, Vol. 31 
