Block Cipher Nonlinear Confusion Components Based on New 5-D Hyperchaotic System

Block Cipher Nonlinear Confusion Components Based on New 5-D Hyperchaotic System

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The security strengths of block ciphers greatly rely barcoo Bridles -Stock bridles on the confusion components which have the tendency to transform the data nonlinearly into the perplexed form.This paper proposes to put forward a novel scheme of generating cryptographically strong nonlinear confusion components of block ciphers, usually termed as substitution-boxes (S-boxes).The anticipated S-box design scheme is based on a novel five-dimensional (5-D) chaotic system analyzed in this paper.

The proposed 5-D dynamical system consists of hyperchaotic phenomenon, KY dimension, conservativity, unstable equilibrium point, and complex phase attractors which are suited for cryptographic applications.The S-box based on hyperchaotic system is made to evolve in order to generate an optimized S-box for high nonlinearity score to make it robust against many linear attacks.The performance analysis of proposed S-box demonstrates that it has bijectivity, Horse Grooming Combs high nonlinearity; satisfied strict avalanche criterion and bits independent criterion; low differential and linear probabilities.

Moreover, performance appraisal of proposed S-box justifies its better strength and features over many recently investigated S-boxes.