集中系·分布系のカオス同期化を用いたRGB画像の秘匿通信

抄録

This paper is concerned with secure communication of RGB images using lumped parameter/distributed parameter chaotic synchronization. As a lumped parameter system generating chaos, we use a discrete-time system describing by a generalized Henon map and construct its synchronization system. Since the discrete-time chaotic system has three-dimensional state variables, it is convenient when designing a secure communication system for RGB images. However, the generalized Henon system and its synchronization system have only a few common encryption keys. To increase the common encryption key, we introduce another chaotic system described by a hyperbolic partial differential equation with logistic boundary condition. Several snapshots of the solution of the hyperbolic system are used to generate a long-length common encryption key of the secure communication system proposed in this paper.