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

A technology for encryption, decryption, and encryption keys, which is applied in the field of image encryption based on four-dimensional quantum Dicke mapping, which can solve the problems of insufficient key space, inability to effectively resist known plaintext attacks and selected plaintext attacks, and insufficient randomness.

Active Publication Date: 2018-12-14
CHANGCHUN UNIV OF SCI & TECH
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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 pla

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

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specific Embodiment approach 1

[0054] Specific implementation mode 1. Combination Figure 1 to Figure 3 Describe this embodiment, the image encryption and decryption method based on four-dimensional quantum Dicke mapping, this method is realized by the following steps:

[0055] Set the user encryption key: the initial value q1(0), p1(0), q2(0), q2(0) of the four-dimensional quantum Dicke chaotic system, the number of iterations TM, the diffusion key group number j1, j2, j3, Scramble key group number i, Logistic mapping iteration times n1, n2, n3, n4.

[0056] Step 1. Input the "aircraft" color plaintext image Pimage with a size of 256*256, such as Figure 3A shown;

[0057] Step 2. Decompose the plaintext image Pimage according to the red, green, and blue components to obtain three color component matrices RP, GP, and BP whose size is M*N;

[0058] Step 3, with the initial value and the number of iterations of the four-dimensional quantum Dicke chaotic system in the user encryption key, iterate the four-...

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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...

Claims

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Application Information

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IPC IPC(8): G06T9/00G06T7/90G06N7/08
CPCG06N7/08G06T7/90G06T9/002G06T2207/10024Y02D30/50
Inventor 底晓强李锦青祁晖从立钢任维武毕琳解男男满振龙陈晓冬
Owner CHANGCHUN UNIV OF SCI & TECH
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