Image encryption and decryption method and device based on chaotic system

Abstract

The invention provides an image encryption method based on a chaotic system, encryption equipment and a storage medium. The specific implementation comprises: firstly, decoding an image in a corresponding format, and then performing pixel scrambling on pixels of three decoded channels through a sequence generated by a chaotic system, so that the purposes of encrypted transmission and storage of the image are achieved. By means of the image encryption device, the encryption time for finishing an image in a JPG format is shorter than 1 second, and the fidelity of the decrypted image is high andis basically consistent with that of an original image. The chaotic system adopts a double-chaotic system, the generated key has high anti-decoding capability, and the whole encryption and decryptionprocess is completed in the device, so that the information security is ensured; and the device is low in cost, low in power consumption and high in practicability.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to an image encryption method based on a chaotic system, an encryption device, and a storage medium. Background technique [0002] In recent years, with the development of network technology, the security of image transmission and storage has become a concern. At present, the image encryption device is mainly based on the PC end, or completed on some hardware. On the PC, a chaotic system can be designed to encrypt images, but the codes and data copies that complete the encryption and decryption will leave traces on the PC. If the security performance of the chaotic system is not good enough, it will easily cause leaks; Chaotic systems are highly complex and require high computing power, which is not conducive to the realization of embedded systems. [0003] In addition, for image encryption based on hardware, at present, the hardware verification of the algorithm is mainl...

AI Technical Summary

Problems solved by technology

On a PC, a chaotic system can be designed to encrypt images, but the codes for encryption and decryption and the copies of data generated will leave traces on the PC. If the security performance of the chaotic system is not good enough, it will easily cause leaks; The chaotic system is highly complex and requires high computing power, which is not conducive to the implementation of embedded systems.

[0003] In addition, for image encryption based on hardware, at present, the hardware verification of the algorithm is mainly done on FPGA and DSP. Although a good encryption effect can be achieved, the high cost of the chip is not conducive to market promotion.

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