An Encryption Algorithm of Chaos Based on Sine Square Mapping

The paper applies chaotic encryption to information document, and designed a simple and fast encryption algorithm based on Sine Square Mapping. This kind of mapping can be chaotic in a wide parameter range and the sequences generated possess larger Lyapunov exponent and excellent dynamical properties. The keys of system´s parameters, initial value and iterations are selected in order to let the chaotic encryption algorithm has a higher security and increase the key space. The simulation results show that the encryption algorithm of this paper can effectively resist the common assault of chaotic systems--statistical attack and brute-force attack.