Image encryption process based on chaotic synchronization phenomena
Image encryption process based on chaotic synchronization phenomena
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DOI：
10.1016/j.sigpro.2012.11.008
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发表时间：
2013-05
期刊：
影响因子：
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通讯作者：
C. Volos;I. Kyprianidis;I. Stouboulos
中科院分区：
文献类型：
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作者：
C. Volos;I. Kyprianidis;I. Stouboulos
本文提出了一种新的图像加密方案，它使用混沌真随机比特发生器（TRBG）。混沌TRBG是基于两种不同同步现象的共存。第一种是众所周知的完全混沌同步，第二种是最近提出的一种新的同步现象，逆π滞后同步。在两个相互耦合的相同的非线性电路的情况下，观察到这种共存。所使用的非线性电路产生双涡卷混沌吸引子。耦合系统的初始条件和电路的参数值作为所提出的加密方案的私钥。为了面对在这样的密码方案中使用这种混沌TRBG的挑战，所产生的比特序列经受众所周知的联邦信息处理标准-140-2的统计测试。然后，该位序列已被用于加密和解密灰度图像。对加密图像的安全性分析表明，该加密方案具有较高的安全性。
This paper presents a novel image encryption scheme, which uses a chaotic True Random Bits Generator (TRBG). The chaotic TRBG is based on the coexistence of two different synchronization phenomena. The first one is the well-known complete chaotic synchronization while the second one is a recently new proposed synchronization phenomenon, the inverse π-lag synchronization. This coexistence is observed in the case of two mutually coupled identical nonlinear circuits. The nonlinear circuit, which is used, produces double-scroll chaotic attractors. The initial conditions of the coupled system and the values of the circuit's parameters serve as the private key of the proposed cryptographic scheme. In order to face the challenge of using this chaotic TRBG in such cryptographic schemes, the produced bits sequence is subjected to statistical tests which are the well-known Federal Information Processing Standards-140-2. This bits sequence has then been used to encrypt and decrypt gray-scale images. Also, the security analysis of the encrypted image demonstrates the high security of the proposed encryption scheme.