Bibliografie

(eng): A hyperchaotic multi-scroll piece wise linear system in R^4 is binarized to generate a pseudo-random sequence which encrypt a grayscale image via symmetric-key algorithm. The sequence is analyzed throughout statistical tests according to the National Institute of Standards and Technology (NIST)specifications. The scrolls of the system are the result of a switching law that changes between the saddle hyperbolic equilibria of piece wise linear systems with eigenvalues as follows: two negative real and one pair of complex conjugate eigenvalue swith positive realpart.Thus, the encryption quality is evaluated depending on the variation of the number of scrolls.