Rapid color image encryption method based on pre-storage and three-dimensional Arnold transformation

Abstract

To improve the image encryption efficiency, under the inspiration of a famous external equipment on-line parallel operation (Simultaneous Peripheral Operations On-Line, Spooling) system, an idea of changing time in space is adopted to design rapid a color image rapid encryption method based on pre-storage and three-dimensional Arnold transformation. Before encryption, T new transformation matrixesin a period are pre-calculated and are respectively stored in T text files. And during encryption, reading the corresponding new transformation matrix from the t th text file (t belongs to [1, T-1]),and new three-dimensional Arnold transformation is carried out on an original image once to obtain an encrypted image. Experiments show that the method is simple to operate and easy to implement, andthe image encryption efficiency can be obviously improved.

Description

technical field

[0001] The invention relates to the technical field of encryption, in particular to a color image fast encryption method based on pre-storage and three-dimensional Arnold transformation. Background technique

[0002] In the information age, a large amount of data and information are shared and used all the time. Problems such as data counterfeiting, leakage, and tampering are common, and people pay more and more attention to information security. According to statistical analysis, 75% of the information obtained by humans comes from image information. Therefore, it is of great significance to study efficient and secure image encryption methods.

[0003] Image encryption methods generally have high requirements for encryption efficiency, but not high requirements for storage space overhead, that is, the size of the occupied storage space.

[0004] Arnold transform is a commonly used encryption method with periodicity. However, it is computationally intensiv...

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