Image encryption method, system, and decryption method, system

• Main Authors: YUE DONGLI, WANG YANMEI, DUAN XINTAO, LIU XINGBING, QIN BEIBEI, XIE ZIMEI
• Format: Patent
• Language: Chinese; English
• Published: 15.01.2019
• Subjects: CALCULATING; COMPUTER SYSTEMS BASED ON SPECIFIC COMPUTATIONAL MODELS; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS

The invention provides an image encryption method, a system and a decryption method. Decomposing the bit plane of the image to be encrypted, calculating the exclusive OR of each plane after decomposing, and synthesizing the calculation results to obtain the preliminary encrypted image; a 4-dimensional hyperchaotic Chen system dynamic equation is adopted to encrypt the preliminary encrypted image to obtain a final encrypt image. According to the technical proposal provided by the invention, before the image to be encrypted is encrypted by using the four-dimensional hyperchaotic Chen system dynamic equation, the image to be encrypted is exclusive OR calculated based on a bit plane, thereby increasing the complexity of image encryption and solving the problem of poor image security caused bya single image encryption method in the prior art. 本发明提供种图像加密方法、系统和解密方法、系统，图像加密方法包括：获取待加密图像；对待加密图像进行位平面分解，对分解后的各位平面进行异或计算，并将计算结果合成，得到初步加密图像；采用四维超混沌Chen系统动力学方程对所述初步加密图像进行加密，得到最终加密图像。本发明提供的技术方案，在采用四维超混沌Chen系统动力学方程对置待加密的图像进行加密之前