A plaintext-related image encryption method based on pud adaptive decomposition

Abstract

The invention relates to a plaintext-related image encryption method based on PUD adaptive decomposition, which performs adaptive PUD decomposition on plaintext images, and performs scrambling-diffusion operations on decomposed two-dimensional components. The encryption key used in this method is related to the plaintext, and the obtained encrypted image can efficiently resist chosen plaintext attack and chosen ciphertext attack, and has strong robustness against filtering noise attack, clipping attack and differential attack, further improving The security and robustness of encrypted images can be applied in the fields of image security and image confidential communication.

Description

technical field [0001] The present invention relates to the technical field of image encryption, and more specifically relates to a plaintext-related image encryption method based on PUD adaptive decomposition. Background technique [0002] With the rapid development of computer network and communication technology, the use and exchange of multimedia content such as digital images, video sequences and audio signals is showing an explosive growth trend. And digital images as visual multimedia content have been widely used in many fields, including medical, commercial and military. For these applications, the transmission of digital images through public channels and storage on cloud platforms must ensure that the images are secure and can only be accessed by authorized institutions. Therefore, the security of digital images is becoming more and more important, and has become an urgent problem to be solved. [0003] Different from traditional text messages, digital images ha...

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Problems solved by technology

However, since these transform domain-based encryption algorithms usually use fixed basis functions (trigonometric functions, wavelet functions) in the process of transforming images, the image encryption algorithms based on transform domain also have the risk of low security and easy to be cracked.

[0004] In order to design an image encryption method with strong security, it is difficult to further improve the security and reliability of the algorithm by encrypting images based on traditional transform domains (such as discrete FT transform, DCT transform, DWT transform, etc.)

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