CN108133450A - A kind of New chaotic image encryption method based on hybrid feedback - Google Patents
A kind of New chaotic image encryption method based on hybrid feedback Download PDFInfo
- Publication number
- CN108133450A CN108133450A CN201611091376.3A CN201611091376A CN108133450A CN 108133450 A CN108133450 A CN 108133450A CN 201611091376 A CN201611091376 A CN 201611091376A CN 108133450 A CN108133450 A CN 108133450A
- Authority
- CN
- China
- Prior art keywords
- image
- encryption
- pixel
- chaos
- sequence
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T1/00—General purpose image data processing
- G06T1/0021—Image watermarking
Abstract
A kind of New chaotic image encryption method based on hybrid feedback, is realized by following steps：Step 1, the generation of key；Step 2, the sequence q of perturbation motion system parameter is generatedj(j=1,2,…,N)；Step 3, initial vector is selected；Step 4, x (1)=k is enabled3, x (1) is F2Initial value；Step 5, x (0)=k is enabled4,p0=k5,x(1)=k6, step 1~4 are repeated, the second wheel is carried out to image data and is encrypted；Step 6, by the encrypted 1 × N of image data of two-wheeled, the image data matrix of m × n is changed back to.The present invention realizes a kind of resume image of the new Chaos Block Encryption based on output and ciphertext hybrid feedback, algorithm does not need to scramble link, utilize the aliasing characteristic of chaos in itself, using output and the method for ciphertext hybrid feedback, both the degeneration of digital chaotic system had been improved, it can make diffusion velocity very fast again, only positive and negative two-wheeled iteration be needed just to reach higher safety.
Description
Technical field
The present invention relates to image encryption technical fields, and in particular to a kind of New chaotic image encryption side based on hybrid feedback
Method.
Background technology
Chaotic maps are used for block cipher, actually come rapidly scramble and diffusion number using the aliasing characteristic of chaos
According to.Usually, single-wheel enciphering transformation E is designed using the methods of scramble, replacement, diffusion when designing block cipher, then, passed through
More wheel iteration are carried out to enciphering transformation E to achieve the purpose that spread and obscure plaintext.Image scrambling can be divided into image pixel positions
Scramble and to gray value of image into line shuffle, the operand of wherein location of pixels scramble is bigger, it is desired to all pictures of image
Vegetarian refreshments traverses, while the correlation being also contemplated that between address.And grey scale pixel value encryption is easily realized, operand is small, effect compared with
It is good.So grey scale pixel value Encryption Algorithm is more universal.In the resume image based on chaos, existing many gray values
Obscure and the method that spreads is all based on a link in Chaos Block Encryption system, being used alone needs larger iteration time
Number, diffusion velocity are slower.
Invention content
The present invention provides a kind of New chaotic image encryption method based on hybrid feedback for above-mentioned problem to be solved.
Purpose to realize the present invention, the technical solution adopted in the present invention are：
A kind of New chaotic image encryption method based on hybrid feedback, the Chaos Block Encryption based on output and ciphertext hybrid feedback
Resume image, algorithm do not need to scramble link, using the aliasing characteristic of chaos in itself, is mixed using output and ciphertext anti-
The method of feedback, Main process steps are as follows：Step 1, the generation of key：The sequence of a 192bit is selected as key, by this
192bit is divided into 6 groups, and every group is 32bit.This 6 groups of bit streams are each mapped to 6 integers:k1,k2,…,k6 ；Step 2, it produces
The sequence q of raw perturbation motion system parameterj(j=1,2,…,N)：Enable x (0)=k1,p0=k2, wherein x (0) is F1Initial value, p0For F1
Parameter.In order to keep chaos sequence qjThere is preferable chaotic characteristic, take 1000 later N number of numbers of F1 iteration divided by 2 take again
Whole obtained number is as qjSequence (q1,q2,…,qN)；Step 3, initial vector is selected：Plaintext image pixel matrix is become 1 ×
The matrix p of N0, in F1(for example selecting iteration 100 times) number is arbitrarily selected in the sequence that iteration generates as initial vector X,
First pixel p (1) of plaintext image and (Xmod256) are subjected to XOR operation by turn and obtain c (1)；Step 4, enable x (1)=
k3, x (1) is F2Initial value：X (1), c (1), p (i), q (i) are substituted into formula (3), the plaintext image data progress first round is added
It is close, obtain the first round encrypted image data；Step 5, x (0)=k is enabled4,p0=k5,x(1)=k6, step 1~4 are repeated, to figure
It is encrypted as data carry out the second wheel, step 3 is slightly different in the second wheel encryption, in order to make Encryption Algorithm to very quick in plain text
Sense, the second wheel iteration must be since the last one pixel, followed by penultimate pixel, last is until first picture
Element；Step 6, by the encrypted 1 × N of image data of two-wheeled, the image data matrix of m × n is changed back to.
The encryption method further includes the design of chaos cipher system：If image pixel matrix is N=m × n, F1,F2All it is
Same chaotic maps, x (0) are F1Initial value, p0For F1Parameter, qjFor F2Parameter, q (j)=Lx (j)/2 ", x (j) are
F1The chaos sequence (j=1,2 ..., N) of generation, p (i+1) is in plain text (the i+1 pixel value of image), i=1,2 ..., N-1, c
(i+1) it is ciphertext (the i+1 pixel value of image after encryption), x (i+1) is the output valve of chaos system.
The output-ciphertext hybrid feedback Chaos Block Encryption with one pixel (8bit) of image be unit, to each
The pixel of image carries out XOR operation by turn, and mathematic(al) representation is encryption:
c(i+1)=p(i+1) ⊕[FK((c(i)+x(i))mod(2n0-1),qj)mod256]⊕c(i)；
Decryption:p(i+1)=c(i+1)⊕c(i)⊕[FK((c(i)+x(i))mod(2n0-1),qj)mod256]。
The present invention realizes a kind of image encryption of the new Chaos Block Encryption based on output and ciphertext hybrid feedback and calculates
Method, algorithm do not need to scramble link, using the aliasing characteristic of chaos in itself, using output and the method for ciphertext hybrid feedback, both
The degeneration of digital chaotic system is improved, and diffusion velocity can be made very fast, only positive and negative two-wheeled iteration is needed just to reach higher
Safety.
Specific embodiment
The following implementation to the present invention is further described, so that those skilled in the art can be better understood from simultaneously
Implement.
Embodiment 1
A kind of New chaotic image encryption method based on hybrid feedback, Main process steps are as follows：Step 1, the generation of key：Selection
This 192bit is divided into 6 groups, every group is 32bit by the sequence of one 192bit as key.This 6 groups of bit streams are mapped respectively
For 6 integers:k1,k2,…,k6 ；Step 2, the sequence q of perturbation motion system parameter is generatedj(j=1,2,…,N)：Enable x (0)=k1,p0=
k2, wherein x (0) is F1Initial value, p0For F1Parameter.In order to keep chaos sequence qjThere is preferable chaotic characteristic, F1 is taken to change
1000 later N number of numbers of generation divided by 2 numbers that rounding obtains again are as qjSequence (q1,q2,…,qN)；Step 3, selection initially to
Amount：Plaintext image pixel matrix is become to the matrix p of 1 × N0, in F1Arbitrarily selected in the sequence that iteration generates (for example selection changes
Generation 100 times) number is as initial vector X, by first pixel p (1) of plaintext image and (Xmod256) progress exclusive or by turn
Operation obtains c (1)；Step 4, x (1)=k is enabled3, x (1) is F2Initial value：X (1), c (1), p (i), q (i) are substituted into formula (3),
First round encryption is carried out to plaintext image data, obtains the first round encrypted image data；Step 5, x (0)=k is enabled4,p0=k5,
x(1)=k6, step 1~4 are repeated, the second wheel is carried out to image data and is encrypted, step 3 is slightly different in the second wheel encryption, is
Make Encryption Algorithm to very sensitive in plain text, the second wheel iteration must be since the last one pixel, followed by penultimate
Pixel, last is until first pixel；Step 6, by the encrypted 1 × N of image data of two-wheeled, the picture number of m × n is changed back to
According to matrix.
The design of chaos cipher system：If image pixel matrix is N=m × n, F1,F2All it is same chaotic maps, x
(0) it is F1Initial value, p0For F1Parameter, qjFor F2Parameter, q (j)=Lx (j)/2 ", x (j) be F1The chaos sequence of generation
(j=1,2 ..., N), p (i+1) is i=1,2 in plain text (the i+1 pixel value of image) ..., N-1, c (i+1) they are ciphertext (encryption
The i+1 pixel value of image afterwards), x (i+1) is the output valve of chaos system.
The above is only embodiments of the present invention, it is noted that those skilled in the art are come
It says, without departing from the technical principles of the invention, several improvement and modification can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (3)
1. a kind of New chaotic image encryption method based on hybrid feedback, the chaos grouping based on output and ciphertext hybrid feedback is close
The resume image of code, algorithm do not need to scramble link, using the aliasing characteristic of chaos in itself, are mixed using output and ciphertext
The method of feedback, which is characterized in that Main process steps are as follows：Step 1, the generation of key：Select the sequence of a 192bit
As key, this 192bit is divided into 6 groups, every group is 32bit;
This 6 groups of bit streams are each mapped to 6 integers:k1,k2,…,k6 ；Step 2, the sequence q of perturbation motion system parameter is generatedj
(j=1,2,…,N)：Enable x (0)=k1,p0=k2, wherein x (0) is F1Initial value, p0For F1Parameter;
In order to keep chaos sequence qjHave preferable chaotic characteristic, take 1000 later N number of numbers of F1 iteration divided by 2 again rounding obtain
The number arrived is as qjSequence (q1,q2,…,qN)；Step 3, initial vector is selected：Plaintext image pixel matrix is become 1 × N's
Matrix p0, in F1Arbitrarily select (for example selecting iteration 100 times) number, will be bright as initial vector X in the sequence that iteration generates
First pixel p (1) of texts and pictures picture carries out XOR operation by turn with (Xmod256) and obtains c (1)；Step 4, x (1)=k is enabled3,x
(1) it is F2Initial value：X (1), c (1), p (i), q (i) are substituted into formula (3), first round encryption is carried out to plaintext image data,
Obtain the first round encrypted image data；Step 5, x (0)=k is enabled4,p0=k5,x(1)=k6, step 1~4 are repeated, to picture number
According to the second wheel encryption is carried out, step 3 is slightly different in the second wheel encryption, in order to make Encryption Algorithm to very sensitive in plain text, the
Two wheel iteration must be since the last one pixel, followed by penultimate pixel, last is until first pixel；Step
6, by the encrypted 1 × N of image data of two-wheeled, change back to the image data matrix of m × n.
2. the New chaotic image encryption method based on hybrid feedback as described in claim 1, which is characterized in that the encryption side
Method further includes the design of chaos cipher system：If image pixel matrix is N=m × n, F1,F2All it is same chaotic maps, x
(0) it is F1Initial value, p0For F1Parameter, qjFor F2Parameter, q (j)=Lx (j)/2 ", x (j) be F1The chaos sequence of generation
(j=1,2 ..., N), p (i+1) is i=1,2 in plain text (the i+1 pixel value of image) ..., N-1, c (i+1) they are ciphertext (encryption
The i+1 pixel value of image afterwards), x (i+1) is the output valve of chaos system.
3. the New chaotic image encryption method based on hybrid feedback as described in claim 1, which is characterized in that the output-
Ciphertext hybrid feedback Chaos Block Encryption, for unit, carries out by turn the pixel of each image with one pixel (8bit) of image
XOR operation, mathematic(al) representation are encryption:
c(i+1)=p(i+1) ⊕[FK((c(i)+x(i))mod(2n0-1),qj)mod256]⊕c(i)；
Decryption:p(i+1)=c(i+1)⊕c(i)⊕[FK((c(i)+x(i))mod(2n0-1),qj)mod256]。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611091376.3A CN108133450A (en) | 2016-12-01 | 2016-12-01 | A kind of New chaotic image encryption method based on hybrid feedback |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611091376.3A CN108133450A (en) | 2016-12-01 | 2016-12-01 | A kind of New chaotic image encryption method based on hybrid feedback |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108133450A true CN108133450A (en) | 2018-06-08 |
Family
ID=62387683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611091376.3A Withdrawn CN108133450A (en) | 2016-12-01 | 2016-12-01 | A kind of New chaotic image encryption method based on hybrid feedback |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108133450A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110752910A (en) * | 2018-07-24 | 2020-02-04 | 华中科技大学 | System for constructing chaos on finite state machine |
| CN117114959A (en) * | 2023-09-13 | 2023-11-24 | 山东青橙数字科技有限公司 | Image encryption method based on key feedback mechanism of multi-parameter one-dimensional chaotic system |
| CN117114959B (en) * | 2023-09-13 | 2024-05-03 | 山东青橙数字科技有限公司 | Image encryption method based on key feedback mechanism of multi-parameter one-dimensional chaotic system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101814985A (en) * | 2010-02-08 | 2010-08-25 | 河南大学 | Block cipher system using multi-chaotic mapping multi-dynamic S-box |
| CN103530571A (en) * | 2013-09-25 | 2014-01-22 | 上海理工大学 | Image encryption method based on sine mapping and Logistic chaos sequence |
| CN104680476A (en) * | 2015-03-03 | 2015-06-03 | 河南大学 | Color image lossless encryption method on basis of two-dimensional discrete wavelet transform and spatiotemporal chaos |
| CN104751401A (en) * | 2015-04-16 | 2015-07-01 | 大连大学 | Novel piecewise linear chaotic mapping image encrypting and encoding method |
-
2016
- 2016-12-01 CN CN201611091376.3A patent/CN108133450A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101814985A (en) * | 2010-02-08 | 2010-08-25 | 河南大学 | Block cipher system using multi-chaotic mapping multi-dynamic S-box |
| CN103530571A (en) * | 2013-09-25 | 2014-01-22 | 上海理工大学 | Image encryption method based on sine mapping and Logistic chaos sequence |
| CN104680476A (en) * | 2015-03-03 | 2015-06-03 | 河南大学 | Color image lossless encryption method on basis of two-dimensional discrete wavelet transform and spatiotemporal chaos |
| CN104751401A (en) * | 2015-04-16 | 2015-07-01 | 大连大学 | Novel piecewise linear chaotic mapping image encrypting and encoding method |
Non-Patent Citations (1)
| Title |
|---|
| 高洁: "一种基于混合反馈的混沌图像加密算法", 《计算机应用》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110752910A (en) * | 2018-07-24 | 2020-02-04 | 华中科技大学 | System for constructing chaos on finite state machine |
| CN117114959A (en) * | 2023-09-13 | 2023-11-24 | 山东青橙数字科技有限公司 | Image encryption method based on key feedback mechanism of multi-parameter one-dimensional chaotic system |
| CN117114959B (en) * | 2023-09-13 | 2024-05-03 | 山东青橙数字科技有限公司 | Image encryption method based on key feedback mechanism of multi-parameter one-dimensional chaotic system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105490802B (en) | The parallel encryption and decryption communication means of improvement SM4 based on GPU | |
| CN106411518B (en) | A kind of unfixed symmetrical whitepack encryption method of key and device | |
| CN101753292B (en) | Methods and devices for a chained encryption mode | |
| CN1993922B (en) | Stream cipher combining system and method | |
| CN101035253B (en) | Encryption or decryption implementing method, device and system | |
| CN110278072A (en) | One kind 16 takes turns SM4-128/128 whitepack password implementation method | |
| Karthigaikumar et al. | Simulation of image encryption using AES algorithm | |
| CN106663387A (en) | Encryption/decryption function generating method, an encryption/decryption method and related apparatuses | |
| CN101882993A (en) | Cryptographic system and cryptographic methods | |
| RU2006139126A (en) | METHODS FOR SCRAMBING AND DECRAMBLING DATA UNITS | |
| CN110474761A (en) | One kind 16 takes turns SM4-256 whitepack password implementation method | |
| CN102801519A (en) | Method and device for implementing AES (Advanced Encryption Standard) enciphering and deciphering | |
| CN106296561A (en) | Image encryption method based on hyperchaotic system and device, decryption method and device | |
| CN107257279A (en) | A kind of clear data encryption method and equipment | |
| CN110535624A (en) | A kind of medical image method for secret protection applied to DICOM format | |
| CN109618073A (en) | A kind of more figure encryption methods based on Hyperchaotic Chen System | |
| JP5689826B2 (en) | Secret calculation system, encryption apparatus, secret calculation apparatus and method, program | |
| EP2904731B1 (en) | Method and device for digital data blocks encryption and decryption | |
| CN114826590A (en) | Packet mode encryption method, packet mode decryption method, packet mode encryption device, packet mode decryption device and packet mode decryption equipment | |
| CN107070637A (en) | A kind of data encryption/decryption method of overlapping packet | |
| CN108133450A (en) | A kind of New chaotic image encryption method based on hybrid feedback | |
| CN108133447A (en) | A kind of chaos encrypting method of coloured image | |
| CN106921486A (en) | The method and apparatus of data encryption | |
| CN103684748B (en) | Symmetric encryption and decryption method, and symmetric encryption and decryption system | |
| CN104574257A (en) | Chaos-based image encryption and decryption algorithm |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180608 |
|
| WW01 | Invention patent application withdrawn after publication |