Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Encryption method based on iteration FrFT and chaotic single-channel color images

A color image and encryption method technology, applied in the field of virtual optical information encryption, can solve problems such as low security, small key space, and complex algorithms

Inactive Publication Date: 2014-04-09
XIAN UNIV OF TECH
View PDF1 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to propose a single-channel color image encryption method based on iterative FrFT and chaos, which solves the problems of small key space, low security, slow convergence speed and complex algorithm in the prior art

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Encryption method based on iteration FrFT and chaotic single-channel color images
  • Encryption method based on iteration FrFT and chaotic single-channel color images
  • Encryption method based on iteration FrFT and chaotic single-channel color images

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0037] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0038] The invention discloses a single-channel color image encryption method based on iterative FrFT (fractional Fourier transform) and chaos. Firstly, the color image is chaotically scrambled and decomposed into C 1 ,C 2 ,C 3 Three parts, then encrypted C 1 ,C 2 get intermediate results The amplitude C of the final encrypted intermediate result 12 and Part III C 3 Get the final ciphertext.

[0039] Specific steps are as follows:

[0040] In the first step, the color image is chaotically scrambled and decomposed into C 1 ,C 2 ,C 3 Three parts, taking the color image "Baboon.jpg" as an example, first convert the three-dimensional M×N×3 pixel "Baboon.jpg" image into a two-dimensional 3M×N pixel grayscale image, and then use pairwise logistic mapping to generate The chaotic sequence pair scrambles the grayscale image to obtain a scr...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

An encryption method based on iteration FrFT and chaotic single-channel color images is characterized by comprising the steps that firstly the color images are placed in chaos and divided into three parts, then two parts are encrypted to obtain a middle result, and finally the amplitude of the middle result and the third part are encrypted to obtain a final cryptograph. The FrFT and the paired Logistic chaotic mapping are combined, so that the encrypted image has the nonlinearity and randomness, the safety and convergence rate of an encryption system are improved, the problem that an existing encryption method is low in convergence rate is solved, meanwhile, the complexity of the color image encryption system is reduced, the system is simple, and operation is convenient.

Description

technical field [0001] The invention belongs to the technical field of virtual optical information encryption methods, and relates to a single-channel color image encryption method based on iterative FrFT (fractional Fourier transform) and chaos. Background technique [0002] In recent years, as the problem of illegal data acquisition on the Internet has become increasingly serious, more and more researchers have turned their attention to image information security. Optical technology can efficiently process two-dimensional data in parallel, so optical encryption technology has become an important research field. In the past two decades, researchers have proposed various image information encryption systems. The double random phase encryption system proposed by Refregier and Javidi has been widely used. The double random phase system is a standard 4-f system. In this system, random phase templates are placed on the input plane and the Fourier plane respectively, so as to c...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H04N1/32H04L9/00
Inventor 隋连升段快快陈涛芦海伟
Owner XIAN UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com