Abstract
In this paper we study the nonlinearity properties of the mixing operations ⊙ ⊞ and ⊕ used in IDEA.We prove that the nonlinearityof the vector function corresponding to the multiplication operation ⊙ is zero for some key points. The Multiplication-Addition (MA) structureof IDEA is slightly changed to avoid the linearities due to these pointsand we suggest a new structure called RMA. The nonlinearity of MA,RMA and their composition are compared.
Cite
CITATION STYLE
Yıldırım, H. M. (2003). Nonlinearity properties of the mixing operations of the block cipher IDEA. In Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) (Vol. 2904, pp. 68–81). Springer Verlag. https://doi.org/10.1007/978-3-540-24582-7_5
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