CN107968705A - A kind of method for encryption/decryption, enciphering/deciphering end and double random phase encrypting and deciphering system - Google Patents
A kind of method for encryption/decryption, enciphering/deciphering end and double random phase encrypting and deciphering system Download PDFInfo
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- CN107968705A CN107968705A CN201711213115.9A CN201711213115A CN107968705A CN 107968705 A CN107968705 A CN 107968705A CN 201711213115 A CN201711213115 A CN 201711213115A CN 107968705 A CN107968705 A CN 107968705A
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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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Abstract
The present invention is suitable for technical field of data processing, there is provided a kind of encryption method, including：According to default cyclic shift value and inverse values generation secrete key；Original plaintext is encrypted using secrete key, obtains initial ciphertext picture；Displacement upset is carried out to initial ciphertext picture according to cyclic shift value and inverse values, obtains accurate final ciphertext；By accurate final ciphertext input double random-phase encoding system, final ciphertext is obtained.The embodiment of the present invention by cyclic shift value and inverse values by generating secrete key, and extra encryption layer is built in original plaintext and double random-phase encoding system using the secrete key, because attack with known plaintext COA can not obtain correct cyclic shift and inverse values when to final ciphertext only attack, therefore secrete key can not be worth to according to correct cyclic shift and upset, so as to which the security of double random-phase encoding system can not can be strengthened by the embodiment of the present invention to being cracked by the encrypted final ciphertext of the embodiment of the present invention.
Description
Technical field
The invention belongs to technical field of data processing, more particularly to a kind of method for encryption/decryption for resisting attack with known plaintext,
Enciphering/deciphering end and double random phase encrypting and deciphering system.
Background technology
The research of optical information security is increasingly taken seriously nearly ten years.Optical encryption system is widely used in information and adds
The field such as close, authentification of message and Information hiding.In optical security encryption, information is optically rather than digital form is handled
, therefore it has the advantages that various dimensions, high concurrency and processing speed are fast.
Double random-phase encoding (Double Random Phase Encoding, DRPE) system is making for nineteen ninety-five proposition
Attempted first with optics encryption system into row information is encrypted.DRPE can be in 4f optical lens systems image area and Fourier
Use in transform domain, can also be used in fractional number Fourier field, Fresnel domain.Although many achievements are achieved, DRPE technologies
Still suffer from some difficulties and challenge, the security intensity such as DRPE systems are not high enough.
Passing, security breaches existing for optical encryption system are actively studied by academia, and propose attack algorithm to break
The optical encryption system is solved, then improves its optical encryption system for the weakness present in the attack option again.Improved light
Learning encryption system may further be cracked by new attack method.This is the side of cracking new in secure encryption system evolution
Method and the new anti-iterative cycles progress process cracked between encryption safe system.For DRPE systems, exist and much attacked
The method of hitting cracks the encryption system, and conventional common attack method has known plain text attack, chosen -plain attact, selection ciphertext to attack
Hit and the attack method such as attack with known plaintext (Ciphertext Only Attack, COA).In these attack methods, only ciphertext
It is the crack method most fatal to DRPE systems to attack COA, because attack with known plaintext COA can be individually illegal from cipher-text information
Ground recovers in plain text, therefore DRPE systems have the security breaches of sternness.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of method for encryption/decryption for resisting attack with known plaintext plus/solution
Close end and double random phase encrypting and deciphering system, it is intended to which attack with known plaintext COA can be individually from cipher-text information in the prior art for solution
In unlawfully recover in plain text, there is the problem of severe security breaches in DRPE systems.
The present invention is achieved in that a kind of encryption method, including：
According to default cyclic shift value and inverse values generation secrete key；
Original plaintext is encrypted using the secrete key, obtains initial ciphertext picture；
Displacement upset is carried out to the initial ciphertext picture according to the cyclic shift value and inverse values, is obtained accurate final close
Text；
By the accurate final ciphertext input double random-phase encoding system, final ciphertext is obtained.
Further, it is described to be included according to default cyclic shift value and inverse values generation secrete key：
According to the cyclic shift value and inverse values generation key seed；
The key seed is inputted into random number generator, generates the secrete key.
Further, described to carry out displacement upset to original plaintext using the secrete key, obtaining initial ciphertext includes：
Binary coding is carried out to the original plaintext, obtains original binary in plain text；
The original binary is encrypted in plain text using the secrete key, obtains the initial ciphertext of binary sequence；
The initial ciphertext of the binary sequence is converted into the initial ciphertext picture.
Further, it is described displacement is carried out to the initial ciphertext picture according to the cyclic shift value and inverse values to turn over
Turn, obtaining accurate final ciphertext includes：
Home position reference information is inserted into the initial ciphertext picture, obtains reference picture；
The reference picture is shifted according to the cyclic shift value, and according to the inverse values to the ginseng after displacement
Examine picture to be overturn, obtain the final ciphertext of standard.
The embodiment of the present invention additionally provides a kind of encryption end, including：
Key generating unit, for generating secrete key according to default cyclic shift value and inverse values；
Plaintext encryption unit, for original plaintext to be encrypted using the secrete key, obtains initial ciphertext picture,
Displacement upset is carried out to the initial ciphertext picture according to the cyclic shift value and inverse values, accurate final ciphertext is obtained, by institute
Accurate final ciphertext input double random-phase encoding system is stated, obtains final ciphertext.
Further, the plaintext encryption unit is specifically used for：
According to the cyclic shift value and inverse values generation key seed；
The key seed is inputted into random number generator, generates the secrete key；
Binary coding is carried out to the original plaintext, obtains original binary in plain text；
The original binary is encrypted in plain text using the secrete key, obtains the initial ciphertext of binary sequence；
The initial ciphertext of the binary sequence is converted into the initial ciphertext picture；
Home position reference information is inserted into the initial ciphertext picture, obtains reference picture；
The reference picture is shifted according to the cyclic shift value, and according to the inverse values to the ginseng after displacement
Examine picture to be overturn, obtain the final ciphertext of standard.
The embodiment of the present invention additionally provides a kind of decryption method, including：
By decruption key and final ciphertext input double random phase decryption system, accurate final ciphertext is obtained；
Displacement upset is carried out to the accurate final ciphertext according to decryption displacement upset information, obtains initial ciphertext picture；
Upset information generation secrete key is shifted according to the decryption, according to the secrete key to the initial ciphertext graph
Piece is decrypted, and obtains original plaintext.
Further, described to carry out displacement upset to the accurate final ciphertext according to decryption displacement upset information, 4 obtain just
Beginning ciphertext picture includes：
Cyclic shift is calculated in reference position information in home position reference information and the accurate final ciphertext
It is worth (x0,y0) and inverse values fp, with the cyclic shift value (x0,y0) and inverse values fpUpset information is shifted as decryption；
By the accurate final ciphertext according to cyclic shift value (- x0,-y0) inverse values-fpShifted and overturn respectively, obtained
To the initial ciphertext picture；
It is then described that upset information generation secrete key is shifted according to the decryption, according to the secrete key to described initial
Ciphertext picture is decrypted, and obtaining original plaintext includes：
According to the cyclic shift value (x0,y0) and inverse values fpKey seed is generated, the key seed is inputted random
Number generator, generates the secrete key；
The initial ciphertext picture is subjected to binary coding, obtains the initial ciphertext of binary sequence；
The initial ciphertext of the binary sequence is decrypted using the secrete key, obtains binary system in plain text；
The binary system is changed in plain text, obtains the original plaintext.
The embodiment of the present invention additionally provides a kind of decrypting end, including：
Ciphertext decryption unit, for decruption key and final ciphertext to be inputted double random phase decryption system, obtains standard most
Whole ciphertext；
Initial decryption unit, for the reference position information in home position reference information and the accurate final ciphertext
Cyclic shift value (x is calculated0,y0) and inverse values fp, with the cyclic shift value (x0,y0) and inverse values fpMoved as decryption
Bit flipping information, by the accurate final ciphertext according to cyclic shift value (- x0,-y0) inverse values-fpShifted and overturn respectively,
Obtain the initial ciphertext picture；
Plaintext decryption unit, for according to the cyclic shift value (x0,y0) and inverse values fpKey seed is generated, by institute
Key seed input random number generator is stated, generates the secrete key, the initial ciphertext picture is subjected to binary system volume
Code, is obtained the initial ciphertext of binary sequence, the initial ciphertext of the binary sequence is decrypted using the secrete key, is obtained
To binary system in plain text, the binary system is changed in plain text, obtains the original plaintext.
The embodiment of the present invention additionally provides a kind of double random phase encrypting and deciphering system for resisting attack with known plaintext, including above-mentioned
The encryption end and decrypting end.
Compared with prior art, the present invention beneficial effect is：The embodiment of the present invention is according to the cyclic shift of user preset
Value and inverse values generation secrete key, and original plaintext is encrypted using the secrete key, obtain initial ciphertext picture, root
Displacement upset is carried out to the initial ciphertext picture according to default cyclic shift value and inverse values, obtains accurate final ciphertext, finally will
In the final ciphertext input double random-phase encoding system DRPE of the standard, final ciphertext is obtained.The embodiment of the present invention will be by that will circulate
Shift value and inverse values generation secrete key, and using the secrete key in original plaintext and double random-phase encoding system DRPE
One extra encryption layer of middle structure, because attack with known plaintext COA can not be circulated correctly when to final ciphertext only attack
Displacement and inverse values, therefore secrete key can not be worth to according to correct cyclic shift and upset, so that can not be to passing through this
The encrypted final ciphertext of inventive embodiments is cracked, and can strengthen double random-phase encoding system by the embodiment of the present invention
Security.
Brief description of the drawings
Fig. 1 is a kind of flow chart of encryption method provided in an embodiment of the present invention；
Fig. 2 is a kind of structure diagram for encrypting end provided in an embodiment of the present invention；
Fig. 3 is a kind of flow chart of decryption method provided in an embodiment of the present invention；
Fig. 4 is a kind of structure diagram of decrypting end provided in an embodiment of the present invention；
Fig. 5 is a kind of structure of double random phase encrypting and deciphering system for resisting attack with known plaintext provided in an embodiment of the present invention
Schematic diagram；
Fig. 6 is a kind of work of double random phase encrypting and deciphering system for resisting attack with known plaintext provided in an embodiment of the present invention
Flow chart.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, it is right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Phase extraction step in existing COA crack methods is sunken there are one, although that is, COA crack methods can be broken
Clear content is solved, but it is incorrect that it, which cracks the cyclic shift of the clear content of recovery and rollover states,.
Based on this, in embodiments of the present invention, it is proposed that confrontation attack with known plaintext double random phase encryption and decryption system
In system, cyclic shift value and inverse values input by user are used to generate secrete key information and using the secrete key in original
Begin to build an extra encryption layer between double random-phase encoding system DRPE in plain text.
Fig. 1 shows a kind of encryption method provided in an embodiment of the present invention, including：
S101, secrete key is generated according to default cyclic shift value and inverse values；
S102, is encrypted original plaintext using the secrete key, obtains initial ciphertext picture；
S103, carries out displacement upset to the initial ciphertext picture according to the cyclic shift value and inverse values, obtains standard
Final ciphertext；
S104, by the accurate final ciphertext input double random-phase encoding system, obtains final ciphertext.
In above-mentioned steps S101, with (x0,y0) represent cyclic shift value, with fpInverse values are represented, with cyclic shift value
(x0,y0) and inverse values fpAs encryption information, secrete key is generated according to the encryption information, specific steps include：According to circulation
Shift value (x0,y0) and inverse values fpKey seed is generated, the key seed is inputted into random number generator, described in generation
Secrete key.
In step s 102, original plaintext is encrypted using the step S101 secrete keys generated, specific encryption
Process includes：Binary coding is carried out to the original plaintext, obtains original binary in plain text；Using the secrete key to institute
State original binary to be encrypted in plain text, obtain the initial ciphertext of binary sequence；By the initial ciphertext conversion of the binary sequence
For the initial ciphertext picture.In this step, the weakness cracked for existing COA attack methods to DRPE, that is, crack knowledge
The incorrect weakness of cyclic shift value and inverse values not gone out, is generated hidden using the cyclic shift value and inverse values of user preset
Key is hidden original plaintext is encrypted, it is safer by original plaintext by this simple cryptographic operation.Further, will
The initial ciphertext of binary sequence is converted to the essence of initial ciphertext picture, is by the binary number in the initial ciphertext of binary sequence
Decimal number is converted to, decimal number is the pixel of initial ciphertext picture.
In S103, the cyclic shift value and inverse values that reuse user preset obtain initially encryption in step S102
Ciphertext picture carries out displacement upset, and specific displacement switching process includes：Home position is inserted into the initial ciphertext picture
Reference information, obtains reference picture；The reference picture is shifted according to the cyclic shift value, and according to the upset
Value overturns the reference picture after displacement, obtains the final ciphertext of standard.
The encryption method provided through this embodiment, added between original plaintext and DRPE systems one it is extra plus
The secrete key of close layer, encryption layer cyclic shift value set by the user and inverse values generation is realized, by this encryption method,
The security of existing DRPE systems can be strengthened, solve the problems, such as attack with known plaintext COA.
Fig. 2 shows a kind of encryption end provided in an embodiment of the present invention, including：
Key generating unit 201, for generating secrete key according to default cyclic shift value and inverse values；
Plaintext encryption unit 202, for original plaintext to be encrypted using the secrete key, obtains initial ciphertext graph
Piece, carries out displacement upset to the initial ciphertext picture according to the cyclic shift value and inverse values, obtains accurate final ciphertext, will
The accurate final ciphertext input double random-phase encoding system, obtains final ciphertext.
Further, plaintext encryption unit 201 is specifically used for：
According to the cyclic shift value and inverse values generation key seed；
The key seed is inputted into random number generator, generates the secrete key；
Binary coding is carried out to the original plaintext, obtains original binary in plain text；
The original binary is encrypted in plain text using the secrete key, obtains the initial ciphertext of binary sequence；
The initial ciphertext of the binary sequence is converted into the initial ciphertext picture；
Home position reference information is inserted into the initial ciphertext picture, obtains reference picture；
The reference picture is shifted according to the cyclic shift value, and according to the inverse values to the ginseng after displacement
Examine picture to be overturn, obtain the final ciphertext of standard.
For above-mentioned encryption method, Fig. 3 shows a kind of decryption method provided in an embodiment of the present invention, including：
S301, double random phase decryption system is inputted by decruption key and final ciphertext, obtains accurate final ciphertext；
S302, carries out displacement upset to the accurate final ciphertext according to decryption displacement upset information, obtains initial ciphertext graph
Piece；
S303, shifts upset information generation secrete key, according to the secrete key to described initial according to the decryption
Ciphertext picture is decrypted, and obtains original plaintext.
In step 301, user is using the encryption key of DRPE encryption systems as decruption key, by decruption key and finally
In ciphertext input double random phase decryption system, decrypt to obtain accurate final ciphertext through the double random phase decryption system.
In step s 302, include reference position information in accurate final ciphertext, the home position used when encrypting is joined
The reference position information examined in information and accurate final ciphertext is calculated, and the positional distance of the two is obtained, according to the positional distance
Determine cyclic shift value (x0,y0) and inverse values fp, by cyclic shift value (x0,y0) and inverse values fp, as decryption displacement upset
Information, determines to need the cyclic shift value (- x for shifting the final ciphertext of the standard with decryption displacement upset information0,-y0) and
Inverse values-fp, according to the cyclic shift value (- x0,-y0) and inverse values-fpThe final ciphertext of the standard is shifted and overturn, is obtained
To initial ciphertext picture.
In step S303, decrypting end is according to cyclic shift value (x0,y0) and inverse values fpKey seed is generated, by described in
Key seed inputs random number generator, generates the secrete key, and the initial ciphertext picture is carried out binary coding,
The initial ciphertext of binary sequence is obtained, the initial ciphertext of the binary sequence is decrypted using the secrete key, is obtained
Binary system is changed in plain text in plain text, to the binary system, obtains the original plaintext.
Fig. 4 shows a kind of decrypting end provided in an embodiment of the present invention, including：
Ciphertext decryption unit 401, for decruption key and final ciphertext to be inputted double random phase decryption system, obtains standard
Final ciphertext；
Initial decryption unit 402, for carrying out displacement upset to the accurate final ciphertext according to decryption displacement upset information,
Obtain initial ciphertext picture.
Plaintext decryption unit 403, for shifting upset information generation secrete key according to the decryption, hides according to described
The initial ciphertext picture is decrypted in key, obtains original plaintext.
Further, initial decryption unit 402 is specifically used for：According to home position reference information and the final ciphertext of standard
In reference position information cyclic shift value (x is calculated0,y0) and inverse values fp, with the cyclic shift value (x0,y0) and turn over
Turn value fpUpset information is shifted as decryption, by the accurate final ciphertext according to cyclic shift value (- x0,-y0) inverse values-fpPoint
Do not shifted and overturn, obtain the initial ciphertext picture.
Plaintext decryption unit 403 is specifically used for：According to the cyclic shift value (x0,y0) and inverse values fpGenerate key kind
Son, inputs random number generator by the key seed, generates the secrete key, and the initial ciphertext picture is carried out two
Scale coding, obtains the initial ciphertext of binary sequence, and the initial ciphertext of the binary sequence is carried out using the secrete key
Decryption, obtains binary system in plain text, and the binary system is changed in plain text, obtains the original plaintext.
Fig. 5 shows a kind of double random phase encrypting and deciphering system for resisting attack with known plaintext provided in an embodiment of the present invention,
Including the encryption end shown in Fig. 2 and the decrypting end shown in Fig. 4.
In a particular application, an encryption end can correspond to one or more decrypting end, that is, encrypt end and complete to original
After encryption of plaintext, the final ciphertext that encryption obtains is transferred to one or more decrypting end, decrypting end is passed according to encryption end
Final key is decrypted in the encryption key used when defeated final ciphertext and encryption.In the present embodiment, end and decryption are encrypted
End carries out encryption and decryption using symmetric mode, i.e., at encryption end using random number generator generation secrete key, then in decrypting end
Secrete key is generated using same random number generator, what encryption end was used when final ciphertext is inputted DEPR encryption systems
Encryption key is using decruption key when using the DRPE decryption systems final ciphertext is decrypted as decrypting end.
Decrypting end is when the final ciphertext to the transmission of encryption end is decrypted, it is necessary to using the raw bits arrived when using encryption
Put reference information, the cyclic shift value of user preset and inverse values and encrypt the encryption key at end, pass through the encryption at the encryption end
Key, home position reference information, cyclic shift value and the inverse values could complete the decryption to final ciphertext.
Fig. 6 show by it is provided in an embodiment of the present invention confrontation attack with known plaintext double random phase encrypting and deciphering system into
Row encryption and decryption flow, including：
A, encrypt end and binary coding is carried out to original plaintext 2DC1, obtain original binary in plain text；
B, cyclic shift value (x of the end according to user setting is encrypted0,y0) and inverse values fpCombine generation key seed；
C, end is encrypted by key seed input random number generator generation secrete key；
D, encrypting end, to original binary, encryption obtains the initial ciphertext of binary sequence in plain text using secrete key；
E, the initial ciphertext of binary sequence is converted to initial ciphertext picture 703D by encryption end；
F, encryption end is inserted into home position reference information Y in initial ciphertext picture 703D and obtains reference picture, and according to
Cyclic shift value (the x of user setting0,y0) and upset fpValue shifts reference picture and upset obtains accurate final ciphertext
Y703D；
G, end is encrypted by accurate final ciphertext Y703D input double random-phase encoding systems DRPE, obtains final ciphertext；
H, final ciphertext is transferred to specific decrypting end by encryption end under unsafe condition environment；
I, decrypting end is using the key of double random-phase encoding system DRPE as decruption key, by the decruption key and finally
The final ciphertext Y703D of standard that ciphertext input double random phase decryption system is decrypted；.
J, decrypting end is according to the home position reference information Y in the final ciphertext Y703D of standard of decryption, during with reference to according to encryption
The positional distance that the home position reference information Y of insertion is calculated, cyclic shift value (x is determined with the positional distance being calculated0,
y0) and upset fpValue, decrypting end will decrypt the obtained final ciphertext Y703D of standard according to circulation position (- x0,-y0) and upset-fp
To initial ciphertext picture 703D；
K, decrypting end obtains the initial ciphertext of binary sequence to initial ciphertext picture 703D by binary coding；
L, decrypting end will decrypt obtained cyclic shift value (x0,y0) and upset fpValue, which combines, generates key seed；
M, random number generator of the decrypting end by key seed input as encryption end, generates secrete key；
N, decrypting end is decrypted the initial ciphertext of binary sequence according to secrete key, obtains decrypting binary in plain text；
O, the binary system that decrypting end obtains decryption is converted to decrypted plaintext 2DC1 in plain text.
In embodiments of the present invention, the existing attack with known plaintext found in being studied using double random-phase encoding system DRPE
It is typically incorrect defect that COA, which cracks the cyclic shift of the clear content of recovery and rollover states, cyclic shift and upset
State generates secrete key as key seed and plaintext is encrypted, and proposes that the enhanced double random phase of confrontation attack with known plaintext adds
Close system, i.e., its first carry out symmetric cryptography before DRPE encryptions and then carry out DRPE encryptions again.Because attack with known plaintext
The cyclic shift and rollover states for the plaintext that COA is cracked are typically incorrect, so its cyclic shift for calculating
With inverse values and incorrect, therefore it cannot get secrete key, so the ciphertext encrypted through the embodiment of the present invention can be with
From attack with known plaintext COA, the security of DRPE encryption systems is improved.
The embodiment of the present invention by symmetric cryptography and the technology that is combined of DRPE encryptions, can be widely applied to military affairs, government affairs,
The information safety protection in the field such as commercial affairs, finance, individual privacy.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should all be included in the protection scope of the present invention.
Claims (10)
- A kind of 1. encryption method, it is characterised in that including：According to default cyclic shift value and inverse values generation secrete key；Original plaintext is encrypted using the secrete key, obtains initial ciphertext picture；Displacement upset is carried out to the initial ciphertext picture according to the cyclic shift value and inverse values, obtains accurate final ciphertext；By the accurate final ciphertext input double random-phase encoding system, final ciphertext is obtained.
- 2. encryption method as claimed in claim 1, it is characterised in that described to be given birth to according to default cyclic shift value and inverse values Include into secrete key：According to the cyclic shift value and inverse values generation key seed；The key seed is inputted into random number generator, generates the secrete key.
- 3. encryption method as claimed in claim 1 or 2, it is characterised in that described to utilize the secrete key to original plaintext It is encrypted, obtaining initial ciphertext includes：Binary coding is carried out to the original plaintext, obtains original binary in plain text；The original binary is encrypted in plain text using the secrete key, obtains the initial ciphertext of binary sequence；The initial ciphertext of the binary sequence is converted into the initial ciphertext picture.
- 4. encryption method as claimed in claim 1, it is characterised in that it is described according to the cyclic shift value and inverse values to institute State initial ciphertext picture and carry out displacement upset, obtaining accurate final ciphertext includes：Home position reference information is inserted into the initial ciphertext picture, obtains reference picture；The reference picture is shifted according to the cyclic shift value, and according to the inverse values to the reference chart after displacement Piece is overturn, and obtains the final ciphertext of standard.
- 5. one kind encryption end, it is characterised in that including：Key generating unit, for generating secrete key according to default cyclic shift value and inverse values；Plaintext encryption unit, for original plaintext to be encrypted using the secrete key, obtains initial ciphertext picture, according to The cyclic shift value and inverse values carry out displacement upset to the initial ciphertext picture, accurate final ciphertext are obtained, by the standard Final ciphertext input double random-phase encoding system, obtains final ciphertext.
- 6. encryption end as claimed in claim 5, it is characterised in that the plaintext encryption unit is specifically used for：According to the cyclic shift value and inverse values generation key seed；The key seed is inputted into random number generator, generates the secrete key；Binary coding is carried out to the original plaintext, obtains original binary in plain text；The original binary is encrypted in plain text using the secrete key, obtains the initial ciphertext of binary sequence；The initial ciphertext of the binary sequence is converted into the initial ciphertext picture；Home position reference information is inserted into the initial ciphertext picture, obtains reference picture；The reference picture is shifted according to the cyclic shift value, and according to the inverse values to the reference chart after displacement Piece is overturn, and obtains the final ciphertext of standard.
- A kind of 7. decryption method, it is characterised in that including：By decruption key and final ciphertext input double random phase decryption system, accurate final ciphertext is obtained；Displacement upset decryption is carried out to the accurate final ciphertext according to decryption displacement upset information, obtains initial ciphertext picture；Upset information generation secrete key is shifted according to the decryption, according to the secrete key to the initial ciphertext picture into Row decryption, obtains original plaintext.
- 8. decryption method as claimed in claim 7, it is characterised in that it is described according to decryption displacement upset information to it is described it is accurate most Whole ciphertext is decrypted, and obtaining initial ciphertext picture includes：Cyclic shift value (x is calculated in reference position information in home position reference information and the accurate final ciphertext0, y0) and inverse values fp, with the cyclic shift value (x0,y0) and inverse values fpUpset information is shifted as decryption；By the accurate final ciphertext according to cyclic shift value (- x0,-y0) inverse values-fpShifted and overturn respectively, obtain institute State initial ciphertext picture；It is then described that upset information generation secrete key is shifted according to the decryption, according to the secrete key to the initial ciphertext Picture is decrypted, and obtaining original plaintext includes：According to the cyclic shift value (x0,y0) and inverse values fpKey seed is generated, the key seed is inputted into random digit Maker, generates the secrete key；The initial ciphertext picture is subjected to binary coding, obtains the initial ciphertext of binary sequence；The initial ciphertext of the binary sequence is decrypted using the secrete key, obtains binary system in plain text；The binary system is changed in plain text, obtains the original plaintext.
- A kind of 9. decrypting end, it is characterised in that including：Ciphertext decryption unit, for decruption key and final ciphertext to be inputted double random phase decryption system, obtains accurate final close Text；Initial decryption unit, calculates for the reference position information in home position reference information and the accurate final ciphertext Obtain cyclic shift value (x0,y0) and inverse values fp, with the cyclic shift value (x0,y0) and inverse values fpTurned over as decryption displacement Transfering the letter breath, by the accurate final ciphertext according to cyclic shift value (- x0,-y0) inverse values-fpShifted and overturn respectively, obtained The initial ciphertext picture；Plaintext decryption unit, for according to the cyclic shift value (x0,y0) and inverse values fpKey seed is generated, will be described close Key seed inputs random number generator, generates the secrete key, and the initial ciphertext picture is carried out binary coding, is obtained To the initial ciphertext of binary sequence, the initial ciphertext of the binary sequence is decrypted using the secrete key, obtains two System is changed in plain text in plain text, to the binary system, obtains the original plaintext.
- 10. a kind of double random phase encrypting and deciphering system for resisting attack with known plaintext, it is characterised in that including 5 or 6 institute of claim Decrypting end described in the encryption end stated and claim 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711213115.9A CN107968705B (en) | 2017-11-28 | 2017-11-28 | Encryption/decryption method, encryption/decryption end and double-random-phase encryption/decryption system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711213115.9A CN107968705B (en) | 2017-11-28 | 2017-11-28 | Encryption/decryption method, encryption/decryption end and double-random-phase encryption/decryption system |
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| Publication Number | Publication Date |
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| CN107968705A true CN107968705A (en) | 2018-04-27 |
| CN107968705B CN107968705B (en) | 2021-02-02 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109067517A (en) * | 2018-06-22 | 2018-12-21 | 成都卫士通信息产业股份有限公司 | Encryption, the communication means for decrypting device, encryption and decryption method and secrete key |
| CN110855437A (en) * | 2019-11-18 | 2020-02-28 | 南京工程学院 | Secure communication method and system based on liquid crystal light valve |
| CN111582284A (en) * | 2020-04-27 | 2020-08-25 | 中国科学院信息工程研究所 | Privacy protection method and device for image recognition and electronic equipment |
| CN111740830A (en) * | 2020-08-12 | 2020-10-02 | 科大讯飞(苏州)科技有限公司 | Information encryption and decryption method and device, information processing equipment and storage medium |
| CN112202757A (en) * | 2020-09-27 | 2021-01-08 | 贵州航天计量测试技术研究所 | Geographic coordinate shape-preserving encryption method |
| CN112953706A (en) * | 2019-12-11 | 2021-06-11 | 中国电信股份有限公司 | Information processing method and device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6002773A (en) * | 1996-02-06 | 1999-12-14 | The University Of Connecticut | Method and apparatus for encryption |
| CN101086811A (en) * | 2007-05-18 | 2007-12-12 | 中国科学院上海光学精密机械研究所 | Method and apparatus for multiple image encryption using optical polarization state |
| CN100589380C (en) * | 2008-02-03 | 2010-02-10 | 西北农林科技大学 | Encryption method based on double-circular queue shift and transposition rule |
| CN105243635A (en) * | 2015-08-21 | 2016-01-13 | 南昌大学 | Image encryption method based on two-dimensional compression perception and chaotic system |
| CN105917381A (en) * | 2015-07-07 | 2016-08-31 | 深圳大学 | Cryptographic Cracking Method and Device Based on Double Random Phase Image Coding System |
| CN105931175A (en) * | 2016-04-28 | 2016-09-07 | 广西师范大学 | Novel image scrambling method based on chaotic technology |
| CN107392834A (en) * | 2017-07-28 | 2017-11-24 | 江西农业大学 | A kind of image encryption method of random rotation displacement |
-
2017
- 2017-11-28 CN CN201711213115.9A patent/CN107968705B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6002773A (en) * | 1996-02-06 | 1999-12-14 | The University Of Connecticut | Method and apparatus for encryption |
| CN101086811A (en) * | 2007-05-18 | 2007-12-12 | 中国科学院上海光学精密机械研究所 | Method and apparatus for multiple image encryption using optical polarization state |
| CN100589380C (en) * | 2008-02-03 | 2010-02-10 | 西北农林科技大学 | Encryption method based on double-circular queue shift and transposition rule |
| CN105917381A (en) * | 2015-07-07 | 2016-08-31 | 深圳大学 | Cryptographic Cracking Method and Device Based on Double Random Phase Image Coding System |
| CN105243635A (en) * | 2015-08-21 | 2016-01-13 | 南昌大学 | Image encryption method based on two-dimensional compression perception and chaotic system |
| CN105931175A (en) * | 2016-04-28 | 2016-09-07 | 广西师范大学 | Novel image scrambling method based on chaotic technology |
| CN107392834A (en) * | 2017-07-28 | 2017-11-24 | 江西农业大学 | A kind of image encryption method of random rotation displacement |
Non-Patent Citations (2)
| Title |
|---|
| XIAOLI LIU 等: "Vulnerability to ciphertext-only attack of optical", 《OPTICS EXPRESS》 * |
| 焦述铭 等: "QR code based noise-free optical encryption and decryption of a gray scale image", 《OPTICS COMMUNICATIONS》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109067517A (en) * | 2018-06-22 | 2018-12-21 | 成都卫士通信息产业股份有限公司 | Encryption, the communication means for decrypting device, encryption and decryption method and secrete key |
| CN110855437A (en) * | 2019-11-18 | 2020-02-28 | 南京工程学院 | Secure communication method and system based on liquid crystal light valve |
| CN112953706A (en) * | 2019-12-11 | 2021-06-11 | 中国电信股份有限公司 | Information processing method and device |
| CN112953706B (en) * | 2019-12-11 | 2022-09-06 | 天翼云科技有限公司 | Information processing method and device |
| CN111582284A (en) * | 2020-04-27 | 2020-08-25 | 中国科学院信息工程研究所 | Privacy protection method and device for image recognition and electronic equipment |
| CN111582284B (en) * | 2020-04-27 | 2023-04-07 | 中国科学院信息工程研究所 | Privacy protection method and device for image recognition and electronic equipment |
| CN111740830A (en) * | 2020-08-12 | 2020-10-02 | 科大讯飞(苏州)科技有限公司 | Information encryption and decryption method and device, information processing equipment and storage medium |
| CN111740830B (en) * | 2020-08-12 | 2020-12-11 | 科大讯飞(苏州)科技有限公司 | Information encryption and decryption method and device, information processing equipment and storage medium |
| CN112202757A (en) * | 2020-09-27 | 2021-01-08 | 贵州航天计量测试技术研究所 | Geographic coordinate shape-preserving encryption method |
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