Grayscale image encryption using a hyperchaotic unstable dissipative system

Here we use a pseudo-random bit generator based on a hyperchaotic unstable dissipative system suitable for encryption. This type of system presents saddle hyperbolic equilibrium points with eigenvalues as follows: two negative real eigenvalue, and one pair of complex conjugated eigenvalues with positive real part. The hyperchaotic system in R4 is binarized in order to generate a pseudo-random sequence, that is used to encrypt binary information of a grayscale image via symmetric-key algorithm. © 2013 Infonomics Society.

Cryptography; Energy dissipation; Internet; Number theory; Binary information; Dissipative systems; Gray-scale images; Hyper-chaotic systems; Hyperbolic equilibriums; Pseudo random; Pseudorandom sequences; Symmetric keys; Eigenvalues and eigenfunctions

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