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Image encryption method fusing quantum walk and improved AES (Advanced Encryption Standard)

An encryption method, quantum technology, applied to an encryption device with a shift register/memory, the usage of multiple keys/algorithms, and key distribution, which can solve problems such as the key is easy to crack, and achieve improved avalanche performance and improved key The ability to resist attacks, security and the effect of high resistance to attacks

Pending Publication Date: 2022-07-12
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is because the fixedness of the initial key and key expansion function of the AES encryption algorithm makes the traditional key easier to crack.

Method used

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  • Image encryption method fusing quantum walk and improved AES (Advanced Encryption Standard)
  • Image encryption method fusing quantum walk and improved AES (Advanced Encryption Standard)
  • Image encryption method fusing quantum walk and improved AES (Advanced Encryption Standard)

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Experimental program
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Embodiment 1

[0055] like Figure 1-Figure 8 As shown, this embodiment provides an image encryption method that combines quantum walk and improved AES, including the following steps:

[0056] S1. Generate a probability density distribution matrix P by alternating quantum random walks;

[0057] S2. Encrypt the plaintext image for the first time;

[0058] S3. Perform secondary encryption on the ciphertext after the initial encryption;

[0059] S4. Decrypt the final ciphertext to generate a decrypted image.

[0060] Generally, the plaintext packet in the AES algorithm is described by a square matrix with bytes as the unit, which is called a state matrix. Among them, the state matrix is:

[0061]

[0062] Although the AES algorithm provides key groups of different lengths, its seed key remains unchanged, so that each plaintext group has the same initial key during the encryption process, even if it is improved by the key expansion function. Given the complexity of the key calculation, t...

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Abstract

The invention relates to the technical field of encryption algorithms, in particular to an image encryption method fusing quantum walks and improved AES (advanced encryption standard), which comprises the following steps of: generating a probability density distribution matrix P through alternating quantum random walks; performing primary encryption on the plaintext image; performing secondary encryption on the ciphertext after the primary encryption; and decrypting the final ciphertext. According to the design, the efficiency of classical calculation problems can be improved; the security of the pseudo-random number can be ensured by the non-traceability and infinite possibility of the initial parameter; the attack resistance of the key is improved, the avalanche performance of the algorithm is also improved, and a guarantee is provided for the security of image information; the secret key is more flexible, and the safety and the attack resistance of the hybrid encryption algorithm are higher; the ciphertext image (R, G, B) channel histograms are uniformly distributed, the encryption effect is obvious, and the differential attack resistance is high; compared with other image encryption protocols, the method is simple, easy to operate and easy to implement in an actual system.

Description

technical field [0001] The invention relates to the technical field of encryption algorithms, in particular, to an image encryption method integrating quantum walk and improved AES. Background technique [0002] The rapid popularization of the Internet has become an important symbol of the information age. The network plays an increasingly important role in people's daily life, and image information occupies a large part of the network information. Risk of leakage, tampering and counterfeiting. After years of development of information security technology, before the information is hidden, the secret information is encrypted according to certain arithmetic rules, so that it loses its original appearance, and then it is hidden in the carrier information, so that the information to be transmitted is encrypted. safer. Even if the attacker extracts the secret information from the carrier, he cannot tell what content is hidden in the encrypted secret information, which makes th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/08H04L9/06H04L9/14
CPCH04L9/0852H04L9/0869H04L9/0631H04L9/14Y02D30/50
Inventor 马鸿洋刘广哲范兴奎邱田会田艳兵李伟宋佳宝
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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