New Dynamical Key Dependent S-Box based on chaotic maps
Journal Title: IOSR Journals (IOSR Journal of Computer Engineering) - Year 2015, Vol 17, Issue 4
Abstract
Abstract: The strength and security of cryptographic algorithms is determined by substitution non-linear Sboxes, so the construction of cryptographically strong S-boxes is important in the design of secure cryptosystems. In In this paper, an efficient method for designing dynamical key dependent S-boxes based on 2D logistic map and 2D cross map. S-box is a nonlinear transformation where each byte of the State is replaced by another byte using the substitution table. Each individual byte of State is mapped into a new byte by using 2D cat map. One S-box is used for each message. The aim of the proposed approach is to generate more secure Sboxes. The generated S-boxes will increase the complexity and has better results in security analysis. The new Sbox is analyzed and tested for the following criteria: avalanche effect, strict avalanche effect, key sensitivity, differential and linear cryptanalysis. All the results have shown that the proposed method is a good candidate for designing dynamical S-boxes that can be widely used in block cipher.
Authors and Affiliations
F. J. Luma1, H. S. Hilal , A. Ekhlas
Keywords
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