CN109120812B - A kind of color image encipher-decipher method retaining truncation based on detour cylinder diffraction and phase - Google Patents
A kind of color image encipher-decipher method retaining truncation based on detour cylinder diffraction and phase Download PDFInfo
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- CN109120812B CN109120812B CN201810737507.3A CN201810737507A CN109120812B CN 109120812 B CN109120812 B CN 109120812B CN 201810737507 A CN201810737507 A CN 201810737507A CN 109120812 B CN109120812 B CN 109120812B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
- H04N1/32101—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title
- H04N1/32144—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title embedded in the image data, i.e. enclosed or integrated in the image, e.g. watermark, super-imposed logo or stamp
- H04N1/32149—Methods relating to embedding, encoding, decoding, detection or retrieval operations
- H04N1/32267—Methods relating to embedding, encoding, decoding, detection or retrieval operations combined with processing of the image
- H04N1/32272—Encryption or ciphering
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
- H04L63/0442—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload wherein the sending and receiving network entities apply asymmetric encryption, i.e. different keys for encryption and decryption
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/002—Countermeasures against attacks on cryptographic mechanisms
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
- H04L9/0861—Generation of secret information including derivation or calculation of cryptographic keys or passwords
- H04L9/0863—Generation of secret information including derivation or calculation of cryptographic keys or passwords involving passwords or one-time passwords
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
- H04L9/0861—Generation of secret information including derivation or calculation of cryptographic keys or passwords
- H04L9/0869—Generation of secret information including derivation or calculation of cryptographic keys or passwords involving random numbers or seeds
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Abstract
The present invention proposes a kind of color image encipher-decipher method for retaining truncation based on detour cylinder diffraction and phase.This method encrypts the plural number combination of any two component in three components of RGB of color image using detour cylinder diffraction process, and two pseudorandom phase-plates are loaded respectively on object plane and intermediate diffraction surfaces.The COMPLEX AMPLITUDE that cylinder diffraction obtains retains method for cutting using phase and carries out isolated amplitude and phase bit position, two phase bit positions that phase retains twice are as two decryption code keys, and the amplitude that first time phase truncation obtains carries out plural number with another component of color image and combines, the amplitude that second of phase truncation obtains then is used as ciphertext to export.This method realizes asymmetric encryption using cylinder diffraction and phase truncation, and can solve the problems, such as linear system, complex values output, information leakage three simultaneously, greatly improves the safety of encryption system.
Description
One, technical field
The present invention relates to a kind of information securities and information optical technical field, especially color image encipher-decipher method.
Two, background technique
The application such as science, technology, medical treatment, education generates the colour information of magnanimity daily, however the colored of these magnanimity is believed
Breath is faced with the potential danger of the leakage and attack of information, therefore the research of color image encryption and decryption becomes more and more important.These researchs
Scramble pixel-based and the scramble two major classes based on transform domain can be totally divided into.The scramble of transform domain due to it is most of can be with
Optical Implementation and have can parallel and fireballing huge advantage, but also some problems demands solve: 1, the linear spy of system
Property reduces cryptographic security；2, complex values output needs to record using the methods of holography, this makes system become complicated, and
To stability requirement harshness；3, the asymmetric encipherment system based on phase truncation method is also faced with the risk of information leakage.To the greatest extent
Pipe proposes many solutions regarding to the issue above, but these methods are only to solve the problems, such as wherein 1 or 2.
Therefore, the color image encryption and decryption technology that can solve three major issues simultaneously is particularly important.
Three, summary of the invention
The present invention proposes a kind of based on detour for above-mentioned linear system, three complex values output, information leakage problems
Cylinder diffraction and phase retain the color image encipher-decipher method of truncation.This method is in three components of RGB of color image
The plural number combination of any two component is encrypted using detour cylinder diffraction process, and two pseudorandom phase-plates add respectively
It is loaded on object plane and intermediate diffraction surfaces.The COMPLEX AMPLITUDE that cylinder diffraction obtains retains method for cutting using phase and separate
To amplitude and phase bit position, phase retains twice two phase bit positions are as two decryption code keys, and first time phase
Another component that obtained amplitude and color image is truncated carries out plural number and combines, and the amplitude that second of phase truncation obtains then is made
For ciphertext output.This method realizes asymmetric encryption using cylinder diffraction and phase truncation, and can solve simultaneously aforementioned
Three major issues, the safety of encryption system can be greatly improved.
The color image encipher-decipher method is as shown in Figure 1, include Fig. 1 (a) ciphering process and Fig. 1 (b) decrypting process
Two parts.
The ciphering process of the color image encipher-decipher method specifically describes are as follows:
Step 1, any two component (I in the RGB three-component of color image to be encrypted1And I2) combination pluralize
Form, and Object light wave (U is converted by laser lighting0), it is first R in a radius1Internal reflection cylinder at, by one with
Machine phase-plate (RPM1) coding, obtain wavefront (U1), the wavefront after reflection passes through the cylinder diffraction of an ecto-entad propagation model
(COIP), the external reflectance cylinder that a radius is r is reached, wavefront is denoted as U2, which is retained by phase and break-in operation divides
From for amplitude (I12) and phase (PK1) two parts, procedural representation are as follows: [I12,PK1]=PRT { COIP [(I1+i×I2)*·
RPM1], wherein * indicates conjugation, i.e. reflection process.
Step 2, amplitude components (I12) with another component (I of color image3) it is combined into plural form (U3), half
Diameter is at the external reflectance cylinder of r by another random phase plate (RPM2) coding, obtain wavefront (U4), the wavefront after reflection passes through
The cylinder diffraction (CIOP) of primary propagation model from inside to outside, reaching a radius is R2Cylinder recording surface, wavefront is denoted as
U5, which is retained by phase and break-in operation is separated into amplitude (I123) and phase (PK2) two parts, procedural representation are as follows:
[I123,PK2]=PRT { CIOP [(I12+i×I3)*·RPM2]}。
The decrypting process of the color image encipher-decipher method specifically describes are as follows:
Step 1, ciphertext (I to be decrypted123) and phase code key (PK2) phase-modulation is carried out, by propagating from inside to outside
The cylinder of model is against diffraction (CIOP-1), obtained complex amplitude (U4) again with conjugation phase-plate (RPM2* it) is encoded to obtain multiple vibration
Width (U3), which passes through one of component (I of the isolated color image of plural number3) and amplitude (I12)。
Step 2, amplitude (I12) and phase code key (PK1) phase-modulation is carried out, by the cylinder of ecto-entad propagation model
Inverse diffraction (COIP-1), obtained complex amplitude (U1) again with conjugation phase-plate (RPM1* it) is encoded to obtain complex amplitude (U0), it should
Complex amplitude passes through two component (I of the isolated color image of plural number1) and (I2)。
Two random phase plate (RPM1And RPM2) it is the pseudo random matrix generated using 2 D chaotic algorithm,
Matrix and image to be encrypted are in the same size.The two random phase plates can be generated without using 2 D chaotic algorithm, and directly be made
It is generated with random generator, or is generated using other pseudo-random generators.
The beneficial effect of this method is: having the good anti-attack ability of asymmetric encipherment system: resisting phase recovery
Attack, known plain text attack, chosen -plain attact, solve the risk problem of information leakage, and the ciphertext of intensity type output is convenient for
Storage and transmission.
Four, the explanation of attached drawing
Attached drawing 1 is encryption and decryption processes schematic diagram of the invention.
Original image " Plane " (512 × 512) to be encrypted in the example of the invention of attached drawing 2.
Phase code key 1 in the example of the invention of attached drawing 3.
Phase code key 2 in the example of the invention of attached drawing 4.
The ciphertext of encrypted image in the example of the invention of attached drawing 5.
The image decrypted in the example of the invention of attached drawing 6.
Five, specific embodiment
The following detailed description of a kind of color image encryption and decryption for retaining truncation based on detour cylinder diffraction and phase of the present invention
One exemplary embodiments of method, are further described specifically this method.It is necessarily pointed out that implementing below
Example is served only for this method and is described further, and should not be understood as the limitation to this method protection scope, which is skilled in technique
Personnel make some nonessential modifications and adaptations to this method according to above-mentioned this method content, still fall within protection model of the invention
It encloses.
The present invention proposes a kind of color image encipher-decipher method for retaining truncation based on detour cylinder diffraction and phase, the party
Method includes encrypting and decrypting two processes.
The present embodiment decrypts two processes by Fig. 1 (a) encryption as shown in Figure 1 and Fig. 1 (b).
The ciphering process of the color image encipher-decipher method specifically describes are as follows:
Step 1, any two component (I in the RGB three-component of color image to be encrypted1And I2) combination pluralize
Form, and Object light wave (U is converted by laser lighting0), it is first R in a radius1Internal reflection cylinder at, by one with
Machine phase-plate (RPM1) coding, obtain wavefront (U1), the wavefront after reflection passes through the cylinder diffraction of an ecto-entad propagation model
(COIP), the external reflectance cylinder that a radius is r is reached, wavefront is denoted as U2, which is retained by phase and break-in operation divides
From for amplitude (I12) and phase (PK1) two parts, procedural representation are as follows: [I12,PK1]=PRT { COIP [(I1+i×I2)*·
RPM1], wherein * indicates conjugation, i.e. reflection process.
Step 2, amplitude components (I12) with another component (I of color image3) it is combined into plural form (U3), half
Diameter is at the external reflectance cylinder of r by another random phase plate (RPM2) coding, obtain wavefront (U4), the wavefront after reflection passes through
The cylinder diffraction (CIOP) of primary propagation model from inside to outside, reaching a radius is R2Cylinder recording surface, wavefront is denoted as
U5, which is retained by phase and break-in operation is separated into amplitude (I123) and phase (PK2) two parts, procedural representation are as follows:
[I123,PK2]=PRT { CIOP [(I12+i×I3)*·RPM2]}。
The decrypting process of the color image encipher-decipher method specifically describes are as follows:
Step 1, ciphertext (I to be decrypted123) and phase code key (PK2) phase-modulation is carried out, by propagating from inside to outside
The cylinder of model is against diffraction (CIOP-1), obtained complex amplitude (U4) again with conjugation phase-plate (RPM2* it) is encoded to obtain multiple vibration
Width (U3), which passes through one of component (I of the isolated color image of plural number3) and amplitude (I12)。
Step 2, amplitude (I12) and phase code key (PK1) phase-modulation is carried out, by the cylinder of ecto-entad propagation model
Inverse diffraction (COIP-1), obtained complex amplitude (U1) again with conjugation phase-plate (RPM1* it) is encoded to obtain complex amplitude (U0), it should
Complex amplitude passes through two component (I of the isolated color image of plural number1) and (I2)。
Two random phase plate (RPM in example of the invention1And RPM2) be generated using 2 D chaotic algorithm it is pseudo- with
Machine matrix, matrix and image to be encrypted are in the same size.
In example of the invention, plural number combination is that two variables (X and Y) group is combined into plural (Z), general expression
Are as follows: Z=X+i × Y.Phase-modulation is that phase-plate (R) is loaded into input complex amplitude (Uin) on obtain output complex amplitude (Uout)
On, general expression are as follows: Uout=Uin·R.Plural number separation is to separate real and imaginary parts, general expression are as follows: Zr=
Real (Z) and Zi=imag (Z), wherein real and imag is respectively to take real and imaginary parts operation.Phase retain with truncation be by
COMPLEX AMPLITUDE is separated into the form of amplitude and phase, general expression are as follows: [A, Φ]=PRT (Z), wherein Z=A × exp
(i2 π × Φ), PRT are phase reservation and break-in operation.The general expression of cylinder diffraction are as follows: Ud=CIOP (Uo) or Ud=
COIP (Uo), wherein CIOP and COIP respectively indicates the cylinder Diffraction Calculation function with ecto-entad propagation model from inside to outside,
Uo and Ud respectively indicates the COMPLEX AMPLITUDE of object plane and diffraction surfaces.The general expression of inverse cylinder diffraction are as follows: Uo=CIOP-1(Ud)
Or Uo=COIP-1(Ud), wherein CIOP-1And COIP-1It respectively indicates and spreads out from inside to outside with the inverse cylinder of ecto-entad propagation model
Penetrate calculating function.
In example of the invention, the column of cylinder diffraction (CIOP) and ecto-entad propagation model of propagation model from inside to outside
The specific formula for calculation of face diffraction (COIP) is as follows:
Wherein, us(θs,zs) and ud(θd,zd) respectively represent the COMPLEX AMPLITUDE of diffraction source headpin face and targeted cylindrical, θ and
Z respectively indicates radial direction and vertical axial coordinate under cylindrical coordinate system, RsAnd RdRespectively represent the radius of source cylinder and targeted cylindrical, i
Indicate imaginary unit, k indicates wave number, and C indicates that a constant, cosa are the obliquity factors of cylinder diffraction, and L indicates diffraction target point
The distance between to diffraction source point.Can unify with the calculation formula of ecto-entad cylinder diffraction from inside to outside by formula (1) Lai
It indicates, difference is to respectively indicate ecto-entad and from inside to outside the obliquity factor cosa of cylinder Diffraction Calculation modelOAnd cosaI
Practical calculation formula it is different, it is specific as shown in formula (2), thus lead to the cylinder diffraction of propagation model from inside to outside
(CIOP) and the calculation formula of the cylinder diffraction (COIP) of ecto-entad propagation model is completely different.If with U1, U2 and U3
The COMPLEX AMPLITUDE of source cylinder, intermediate diffraction cylinder and final diffraction cylinder is respectively indicated, then the complex amplitude of final diffraction surfaces
The available formula (2) of distribution is calculated.
In example of the invention, parameter cylinder height, inner prop radius surface, source cylinder radius, final cylinder radius difference
With H, r, R1、R2It indicates, they are respectively set as 32mm, 10mm, 200mm, 220mm.Wavelength X is 96um.The ginseng of chaos algorithm
Number x0,y0, a, and b is respectively set as 0.116,0.795,3.774, and 3.674.
Original image to be encrypted is as shown in Fig. 2, two phase code keys are as shown in Figure 3 and Figure 4, and the ciphertext of encryption is as shown in figure 5, only
There are system parameter (height, internal diameter, 1 outer diameter of outer diameter, 2 and in the encryption of two random phase plates, two phase code keys and cylinder
Wavelength) in the correct situation of code key, it can just access and as shown in FIG. 6 be decrypted correctly result.
Claims (2)
1. a kind of color image encipher-decipher method for retaining truncation based on detour cylinder diffraction and phase, which is characterized in that the party
Method includes two parts of ciphering process and decrypting process；The ciphering process specifically describes are as follows: step 1, colour to be encrypted
Any two component I in the RGB three-component of image1And I2It is combined into plural form, and is converted into object light by laser lighting
Wave U0, it is first R in a radius1Internal reflection cylinder at, by a random phase plate RPM1Coding, obtains wavefront U1, reflection
Wavefront afterwards passes through the cylinder diffraction COIP of an ecto-entad propagation model, reaches the external reflectance cylinder that a radius is r,
Wavefront is denoted as U2, which is retained by phase and break-in operation is separated into amplitude I12With phase PK1Two parts, procedural representation
Are as follows: [I12,PK1]=PRT { COIP [(I1+i×I2)*·RPM1], wherein * indicates conjugation, i.e. reflection process, PRT { } table
Show phase reservation and break-in operation；Step 2, amplitude components I12With another component I of color image3It is combined into plural form
U3, by another random phase plate RPM at the external reflectance cylinder that radius is r2Coding, obtains wavefront U4, after reflection wavefront warp
The cylinder diffraction CIOP for crossing primary propagation model from inside to outside, reaching a radius is R2Cylinder recording surface, wavefront is denoted as
U5, which is retained by phase and break-in operation is separated into amplitude I123With phase PK2Two parts, procedural representation are as follows: [I123,
PK2]=PRT { CIOP [(I12+i×I3)*·RPM2]}；The decrypting process specifically describes are as follows: step 1, to be decrypted is close
Literary I123With phase code key PK2Phase-modulation is carried out, by the cylinder of propagation model from inside to outside against diffraction CIOP-1, what is obtained answers
Amplitude U4Again with conjugation phase-plate RPM2* it is encoded to obtain complex amplitude U3, the complex amplitude is by the isolated color image of plural number
One of component I3With amplitude I12；Step 2, amplitude I12With phase code key PK1Phase-modulation is carried out, by ecto-entad
The cylinder of propagation model is against diffraction COIP-1, obtained complex amplitude U1 again with conjugation phase-plate RPM1* it is encoded to obtain complex amplitude
U0, two component I of the isolated color image of complex amplitude process plural number1And I2；Two random phase plate RPM1With
RPM2It is the pseudo random matrix generated using 2 D chaotic algorithm, matrix and image to be encrypted are in the same size.
2. a kind of color image encryption and decryption side for retaining truncation based on detour cylinder diffraction and phase according to claim 1
Method, two random phase plates can be generated directly using random generator, or be produced using other pseudo-random generators
It is raw.
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| CN110191251A (en) * | 2019-05-13 | 2019-08-30 | 四川大学 | A kind of scalability optical image encryption method based on cylinder diffraction and phase truncation |
| CN110210235B (en) * | 2019-05-24 | 2022-10-21 | 四川大学 | Asymmetric multi-image encryption method based on cylindrical diffraction and phase truncation |
| CN110706144B (en) * | 2019-09-17 | 2020-07-07 | 四川大学 | Optical color image encryption method based on spiral phase transformation and equal-mode decomposition |
| CN111177745B (en) * | 2019-12-12 | 2023-06-27 | 湖南科技大学 | Nonlinear phase-truncated double-image encryption and decryption method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102087503A (en) * | 2011-01-11 | 2011-06-08 | 浙江师范大学 | Double-random-phase optical color image encryption device and method |
| CN106447591A (en) * | 2016-10-13 | 2017-02-22 | 天津大学 | Cascade Fresnel holographic encryption system and method combining two-dimensional chaos and constrained optimization algorithm |
| CN106485761A (en) * | 2016-09-16 | 2017-03-08 | 天津大学 | Simple lens color image encryption system |
| CN206249424U (en) * | 2016-10-13 | 2017-06-13 | 天津大学 | With reference to 2 D chaotic and the cascade fresnel holography encryption system of constrained optimization method |
| CN107318028A (en) * | 2017-06-23 | 2017-11-03 | 福建师范大学 | Many image encrypting and decrypting methods and computer-readable recording medium |
| CN107800924A (en) * | 2017-09-11 | 2018-03-13 | 天津大学 | Wavelet transform chaos Double random phase single channel coloured picture encryption method |
| CN108063881A (en) * | 2017-12-27 | 2018-05-22 | 四川大学 | The bicylindrical random phase encoding encryption method of coloured image |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1120737A1 (en) * | 2000-01-27 | 2001-08-01 | Rolic AG | Optical security device |
-
2018
- 2018-07-02 CN CN201810737507.3A patent/CN109120812B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102087503A (en) * | 2011-01-11 | 2011-06-08 | 浙江师范大学 | Double-random-phase optical color image encryption device and method |
| CN106485761A (en) * | 2016-09-16 | 2017-03-08 | 天津大学 | Simple lens color image encryption system |
| CN106447591A (en) * | 2016-10-13 | 2017-02-22 | 天津大学 | Cascade Fresnel holographic encryption system and method combining two-dimensional chaos and constrained optimization algorithm |
| CN206249424U (en) * | 2016-10-13 | 2017-06-13 | 天津大学 | With reference to 2 D chaotic and the cascade fresnel holography encryption system of constrained optimization method |
| CN107318028A (en) * | 2017-06-23 | 2017-11-03 | 福建师范大学 | Many image encrypting and decrypting methods and computer-readable recording medium |
| CN107800924A (en) * | 2017-09-11 | 2018-03-13 | 天津大学 | Wavelet transform chaos Double random phase single channel coloured picture encryption method |
| CN108063881A (en) * | 2017-12-27 | 2018-05-22 | 四川大学 | The bicylindrical random phase encoding encryption method of coloured image |
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