Abstract—This document show a software that show different chaotic generator, as continuous as discrete time. The software give the option for obtain the different signals, using different parameters and initial condition value. The program show then critical parameter for each model. All theses models are capable of encrypter information, this software show it too. Keywords—cryptography, chaotic attractors, software. I. INTRODUCTION HE chaos theory describes the behavior of certain dynamical systems that may exhibit dynamics that are highly sensitive to initial conditions, popularly referred to as the butterfly effect. As a result of this sensitivity, the behavior of chaotic systems appears to be random. The future dynamics of these systems are completely defined by their initial conditions. This behavior is known as deterministic chaos, or simply chaos. Chaotic behavior is also observed in natural systems, such as the weather. This may be explained by a chaos- theoretical analysis of a mathematical model of such a system, embodying the laws of physics that are relevant for the natural system. The chaotic behavior occurs in many areas of practical engineering, i.e., in communications, the information transmission plays a crucial role, where an ever-growing Cardoza-Avendaño L. is with the Baja California Autonomous University (UABC), Ensenada, B.C. 22860 México; (e-mail: lcardoza@uabc.mx). R. M. López Gutiérrez is with the Baja California Autonomous University (UABC), Ensenada, B.C. 22860 México (corresponding author to provide phone: +52 646-175-0744; fax: +52 646-174-4333; (e-mail: roslopez@uabc.mx). C. Cruz Hernández is with the Electronics and Telecommunications Department, Scientific Research and Advanced Studies of Ensenada (CICESE), Ensenada B.C. 22860 México; (e-mail: ccruz@cicese.mx). E. Inzunza is with the Baja California Autonomous University (UABC), Ensenada, B.C. 22860 México; (e-mail: einzunza@ uabc.mx). E. E. García Guerrero is with the Baja California Autonomous University (UABC), Ensenada, B.C. 22860 México ; (e-mail: eegarcia@uabc.mx). V. Spirin is with Scientific Research and Advanced Studies of Ensenada; (e- mail: vaspir@cicese.mx ). H. Serrano is with the Baja California Autonomous University (UABC), Ensenada, B.C. 22860 México; (e-mail: hazael@uabc.mx). capacity for communication services is required. Two of the major requirements in communication systems are privacy and security. The chaotic systems [1]-[9] have been greatly motivated by the possibility of encoding information by using a chaotic carrier. Hence, we are interesting in software that shows the behavior of different chaotic signal. In this paper we present software for different chaotic attractor, for continuous–time and discrete-time systems. II. CHAOTIC SIGNAL GENERATION A. Continuous Different models exist for chaotic dynamics in continuous time. They use differential equations that exhibits chaotic dynamics associated with the fractal properties of the attractor. 1) Lorenz Lorenz wrote a remarkable article in 1963, he described a three parameter of the nonlinear first-order ordinary differential equation that, when integrated numerically on a computer, appeared to have extremely complicated solutions. This set of ordinary differential equations that would model some of the unpredictable behavior that we normally associate with the weather [10]. They are ) ( ) ( ) ( ) ( ), ( ) ( ) ( ) ( ) ( )), ( ) ( ( ) ( 3 2 1 3 3 1 2 1 2 1 2 1 t bx t x t x t x t x t x t x t rx t x t x t x t x (1) Where =10, b=8/3, and r=28. a) 0<r<1. There is only stable equilibrium point at the origin. b) 1<r<1.346. Two new stable nodes are born and the origin becomes a saddle with a one-dimensional, unstable manifold. c) 1.346<r<13.926. At the lower value the stable nodes become stable spirals. d) 13.926<r<24.74. Unstable limit cycles are born near each of the spiral nodes, and the basins of attraction of each of the two fixed points become intertwined. The steady-steady notion is sensitive to initial conditions. e) 24.74<r. All three fixed points becomes unstable. Chaotic motions result. Encrypter Information Software Using Chaotic Generators Cardoza-Avendaño L., López-Gutiérrez R.M., Inzunza-González E., Cruz-Hernández C., García-Guerrero E., Spirin V., and Serrano H. T World Academy of Science, Engineering and Technology International Journal of Computer and Information Engineering Vol:3, No:6, 2009 1566 International Scholarly and Scientific Research & Innovation 3(6) 2009 scholar.waset.org/1307-6892/15852 International Science Index, Computer and Information Engineering Vol:3, No:6, 2009 waset.org/Publication/15852