A pseudorandom bit generator based on hyperbolic cosine function

In the literature, little attention is paid to devising and analyzing novel one dimensional chaotic mappings. our previous efforts, we have tried fold, translation & scale on arctangent function sigmoid respectively, which brings good results. this paper, do same obtain a variant of Hyperbolic Cosine Function. Both Bifurcation Diagram Lyapunov Exponent Spectrum manifest that new mapping possesses wonderful properties. Then, pseudorandom bit generator designed based it. Pseudorandom tests demonstrate much better than ones. It owns great application prospect.