A dual graph encryption method based on fraction rank Fourier conversion

A technology of fractional Fourier and encryption method, which is applied in the field of information security, and can solve the problems of undiscussed secret map performance, difficult optical realization, mutual interference of decrypted maps, etc.
CN101150402AInactive Publication Date: 2008-03-26BEIJING INSTITUTE OF TECHNOLOGYGY
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Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
BEIJING INSTITUTE OF TECHNOLOGYGY
Publication Date
2008-03-26
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

This invention puts forward a method for encrypting double images based on fractional stage Fourier transformation, which disorders pixels of one of two original images, then carries out pure phase coding to the disordered result to multiply the other original image to generate a composite image with a duplicate swing and then makes fractional stage Fourier domain double random phase coding and encryption to get an encrypted image having generalized stable white noise approaching to gaussion distribution, which presents a method for reducing errors by threshold value by analyzing influence to decryption result by disturbance.
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Description

Technical field

[0001] The invention relates to the fields of information security and information optics, especially image encryption technology, which is suitable for encrypting two images that need to be managed and used together. Background technique

[0002] Image information is vivid and vivid, and has become one of the important means for human beings to express information. With the rapid development of network multimedia technology, the acquisition, transmission, and processing of image data have spread to every corner of the digital age, such as finance, e-commerce and government affairs, modern military information transmission, and various personal businesses. While the operation is more convenient, the security problem is also becoming more and more serious. Encryption is the most direct means to protect the security of image information. Image encryption technology processes them into random noise-like meaningless images for confidential transmission and stora...

Claims

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