Speech scrambler based on proposed random chaotic maps

Cryptography techniques must develop with the developing of wireless communication technologies. One of recent research is chaos based cryptography. Since there is data redundant in chaos signal, and not all chaos maps are random, also the attacker can take a periodic shape of chaos signal and found the system parameters. This paper proposed modifies two of chaos maps (Lorenz, Chen) and using it as pseudorandom number generator (PRNG). By using...