Chaotic cryptosystem with high sensitivity to parameter mismatch

In this brief, we present a new sufficient condition for the stabilization and the synchronization of Chuaʹs circuit. The Chuaʹs circuit is used in our chaotic secure cryptosystem and the relaxed stability condition enables us to obtain a larger bound on the impulsive interval, which leads to a higher efficiency in bandwidth utilization. In the proposed system, we introduce the concept of a magnifying glass to enlarge and observe minor parameter mismatch and hence to increase the sensitivity and the security level of the cryptosystem. We use speech transmission as an example to illustrate that the proposed cryptosystem can achieve an excellent encryption effect and that it is sensitive to parameter mismatch.