*4.2. Secret Key Space*

In the proposed algorithm, the secret key contains 16 parameters. The parameters of the chaotic map are double precise, and the parameters related to the number of iterations are in the range of 0 to 1000. Thus, the secret key space can reach 0.81 × <sup>10</sup><sup>192</sup> > <sup>2</sup>637, which is large enough to resist statistical attacks.
