Image encryption and decryption method based on four-dimensional quantum Dicke mapping

Abstract

The invention provides an image encryption and decryption method based on four-dimensional quantum Dicke mapping and relates to the field of image encryption technology. The invention aims to solve the shortage of key space and insufficient randomness, as well as inability to effectively resist known plaintext attacks and security flaws in selective plaintext attacks in the existing image encryption methods. The invention uses a quantum Dicke chaotic system as a key generator to generate a plurality of sets of scrambling keys and diffusion keys, which are randomly selected by a user. The invention ensures the key space and the key sensitivity, shortens the length of the key and reduces the cost of storing and transmitting the key by the user. The invention applies the hyperchaotic system of the fractional-order quantum cellular neural network to the image diffusion stage, The hyperchaotic characteristic of the fractional-order quantum cellular neural network system guarantees the randomness and ergodicity of image diffusion, and the encryption method of the invention can effectively resist the known plaintext attack and the selected plaintext attack because the diffusion key streamis related to plaintext.

Description

technical field [0001] The invention relates to the technical field of image encryption, in particular to an image encryption method based on four-dimensional quantum Dicke mapping. Background technique [0002] A good encryption algorithm should be key-sensitive, and the key space should be large enough to resist brute-force attacks. In the traditional encryption method, there are problems of insufficient key space and insufficient randomness. At the same time, because there is no correlation between the key and the plaintext, the attacker can use some known attack methods based on plaintext and ciphertext pairs to attack Attacks on encryption systems that cause security flaws and loopholes in existing encryption technologies. [0003] In recent years, with the development of quantum information science, people began to try to use some concepts of quantum information to understand quantum chaos and achieved fruitful research results, which revealed the nature of chaotic be...

AI Technical Summary

Problems solved by technology

[0004] The present invention solves the problem of insufficient key space and insufficient randomness in existing image encryption methods, and cannot effectively resist known plaintext attacks and chosen plaintext attacks security flaws and other issues, an image encryption and decryption method based on four-dimensional quantum Dicke mapping is provided

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