A Decryption Method Based on Chaotic S-Box Image Encryption Algorithm

Abstract

The invention discloses a decryption method of an image encryption algorithm based on a chaotic S box. The method comprises the steps of selecting 256 grayscale images with pixels of all 0, all 1, all2, ... ,all 255, and encrypting the 256 grayscale images through an original encryption algorithm, so as to obtain 256 plaintext pixel matrixes; then acquiring a pixel matrix of an encrypted ciphertext image; traversing and comparing the pixel of each position in the 256 plaintext pixel matrixes with the pixel of corresponding position in the pixel matrix of the ciphertext image, and finding outeach original pixel corresponding to the pixel in each position of the ciphertext image, so as to obtain an original image corresponding to the encrypted ciphertext image. Through adoption of the method, the encrypted image can be decrypted successfully without acquiring a key, the image recovery rate is high, and the calculation process is simplified. The method is suitable for an original encryption algorithm and any S box-based encryption system, and has the advantages of high image recovery rate and wide application range.

Description

technical field [0001] The invention relates to the technical field of cryptanalysis, in particular to a decryption method based on a chaotic S-box image encryption algorithm. Background technique [0002] With the rapid development of network technology, while bringing various conveniences to people's lives, network information security has also attracted more and more attention. People communicate through various transmission media, such as video, audio, files, images, etc. During the transmission process of transmission media, some information security issues will inevitably arise. For information security, it is necessary to ensure the confidentiality, authenticity, integrity, unauthorized copying of information and the security of the parasitic system. The information security system under network security is the key to ensuring information security, so message authentication, data encryption, and image encryption to ensure the perfection of the security mechanism and ...

AI Technical Summary

Problems solved by technology

Due to the large amount of information in digital image processing, the frequency bandwidth occupied, the large data redundancy, and the high similarity between adjacent pixels, the use of traditional encryption technology will have the disadvantages of low efficiency and waste of computing resources.

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